Update API Management diagrams

Author: johndowns

articles/reliability/media/reliability-api-management/automatic-single-unit.png

@@ -70,13 +70,13 @@ You can use automatic availability zone support to choose either a single unit o
 
     The following diagram shows an API Management instance with three units that's configured for automatic availability zone support:
 
-    :::image type="complex" border="false" source="./media/reliability-api-management/zone-redundant-automatic-multi-unit.png" alt-text="Diagram that shows three API Management units distributed across availability zones for automatic availability zone support." lightbox="./media/reliability-api-management/zone-redundant-automatic-multi-unit.png":::
+    :::image type="complex" border="false" source="./media/reliability-api-management/zone-redundant-automatic-multi-unit.svg" alt-text="Diagram that shows three API Management units distributed across availability zones for automatic availability zone support.":::
        The diagram shows three boxes labeled Unit 1, Unit 2, and Unit 3 deployed in an API Management instance. Each unit box contains two icons that represent VMs. Three larger boxes are labeled Availability Zone 1, Availability Zone 2, and Availability Zone 3. Zone 1 contains unit 1, zone 2 contains unit 2, and zone 3 contains unit 3.
     :::image-end:::
 
 - **Single-unit configuration:** If your instance has a single unit, the unit's underlying VMs are distributed to two availability zones. There's no way to determine which availability zones the unit's VMs are placed into.
 
-    :::image type="complex" border="false" source="./media/reliability-api-management/automatic-single-unit.png" alt-text="Diagram that shows a single API Management unit distributed across two availability zones for automatic availability zone support." lightbox="./media/reliability-api-management/automatic-single-unit.png":::
+    :::image type="complex" border="false" source="./media/reliability-api-management/automatic-single-unit.svg" alt-text="Diagram that shows a single API Management unit distributed across two availability zones for automatic availability zone support.":::
        The diagram shows one box that's labeled Unit 1 deployed in an API Management instance. The unit box contains two icons that represent VMs. Three larger boxes are labeled Availability Zone 1, Availability Zone 2, and Availability Zone 3. The Unit 1 box spans zones 1 and 2. Zone 3 is empty.
     :::image-end:::
 
@@ -86,13 +86,13 @@ If you want to explicitly select the availability zones to use, you can choose b
 
 - **Zone-redundant:** Manually configure zone redundancy for an API Management instance in a supported region to provide redundancy for service components. When you select two or more availability zones to use, Azure automatically replicates the service components across the selected zones.
 
-    :::image type="complex" border="false" source="./media/reliability-api-management/zone-redundant-automatic-multi-unit.png" alt-text="Diagram that shows three API Management units distributed across availability zones for manual zone redundancy." lightbox="./media/reliability-api-management/zone-redundant-automatic-multi-unit.png":::
+    :::image type="complex" border="false" source="./media/reliability-api-management/zone-redundant-automatic-multi-unit.svg" alt-text="Diagram that shows three API Management units distributed across availability zones for manual zone redundancy.":::
        The diagram shows three boxes labeled Unit 1, Unit 2, and Unit 3 deployed in an API Management instance. Each unit box contains two icons that represent VMs. Three larger boxes are labeled Availability Zone 1, Availability Zone 2, and Availability Zone 3. Zone 1 contains unit 1, zone 2 contains unit 2, and zone 3 contains unit 3.
     :::image-end:::
 
 - **Zonal:** The API Management service components are deployed in a single zone that you select within an Azure region. All of the units are placed into the same availability zone.
 
-    :::image type="complex" border="false" source="./media/reliability-api-management/zonal.png" alt-text="Diagram that shows a zonal API Management deployment that has two units, in a single availability zone." lightbox="./media/reliability-api-management/zonal.png":::
+    :::image type="complex" border="false" source="./media/reliability-api-management/zonal.svg" alt-text="Diagram that shows a zonal API Management deployment that has two units, in a single availability zone.":::
        The diagram shows two boxes labeled Unit 1 and Unit 2 deployed in an API Management instance. Each unit box contains two icons that represent VMs. Three larger boxes are labeled Availability Zone 1, Availability Zone 2, and Availability Zone 3. Zone 1 contains both Unit 1 and Unit 2 boxes. Zone 2 and Zone 3 don't contain any units.
     :::image-end:::