Refactor handoff documentation: rename and replace multi-step tasks files for clarity and consistency

Author: ChrisHowd

…ain-agents-handoffs-multi-step-tasks.yml …-agents-handoffs-multiple-step-tasks.ymllearn-pr/wwl-azure/configure-customize-github-copilot-visual-studio-code/5-chain-agents-handoffs-multi-step-tasks.yml renamed to learn-pr/wwl-azure/configure-customize-github-copilot-visual-studio-code/5-chain-agents-handoffs-multiple-step-tasks.yml learn-pr/wwl-azure/configure-customize-github-copilot-visual-studio-code/5-chain-agents-handoffs-multi-step-tasks.yml renamed to learn-pr/wwl-azure/configure-customize-github-copilot-visual-studio-code/5-chain-agents-handoffs-multiple-step-tasks.yml

@@ -1,5 +1,5 @@
 ### YamlMime:ModuleUnit
-uid: learn.wwl.configure-customize-github-copilot-visual-studio-code.chain-agents-handoffs-multi-step-tasks
+uid: learn.wwl.configure-customize-github-copilot-visual-studio-code.chain-agents-handoffs-multiple-step-tasks
 title: "Chain agents with handoffs for multi-step tasks"
 metadata:
   title: "Chain Agents with Handoffs for Multi-Step Tasks"
@@ -10,4 +10,4 @@ metadata:
   ms.topic: unit
 durationInMinutes: 6
 content: |
-  [!include[](includes/5-chain-agents-handoffs-multi-step-tasks.md)]
+  [!include[](includes/5-chain-agents-handoffs-multiple-step-tasks.md)]

…hain-agents-handoffs-multi-step-tasks.md …n-agents-handoffs-multiple-step-tasks.mdlearn-pr/wwl-azure/configure-customize-github-copilot-visual-studio-code/includes/5-chain-agents-handoffs-multi-step-tasks.md renamed to learn-pr/wwl-azure/configure-customize-github-copilot-visual-studio-code/includes/5-chain-agents-handoffs-multiple-step-tasks.md learn-pr/wwl-azure/configure-customize-github-copilot-visual-studio-code/includes/5-chain-agents-handoffs-multi-step-tasks.md renamed to learn-pr/wwl-azure/configure-customize-github-copilot-visual-studio-code/includes/5-chain-agents-handoffs-multiple-step-tasks.md

@@ -35,7 +35,7 @@ units:
 - learn.wwl.configure-customize-github-copilot-visual-studio-code.examine-benefits-customize-github-copilot
 - learn.wwl.configure-customize-github-copilot-visual-studio-code.customize-copilot-responses-instruction-files
 - learn.wwl.configure-customize-github-copilot-visual-studio-code.create-custom-github-copilot-agents
-- learn.wwl.configure-customize-github-copilot-visual-studio-code.chain-agents-handoffs-multi-step-tasks
+- learn.wwl.configure-customize-github-copilot-visual-studio-code.chain-agents-handoffs-multiple-step-tasks
 - learn.wwl.configure-customize-github-copilot-visual-studio-code.exercise-create-chain-custom-copilot-agents
 - learn.wwl.configure-customize-github-copilot-visual-studio-code.knowledge-check
 - learn.wwl.configure-customize-github-copilot-visual-studio-code.summary