github: Update workflow file.

Author: mtwebster

.github/workflows/build.yml

@@ -23,3 +23,16 @@ jobs:
       ############################## Comma separated list - like 'linuxmint/xapp, linuxmint/cinnamon-desktop'
       dependencies: linuxmint/cinnamon-desktop
       ##############################
+
+  # Generate test packages when /generate-test-packages is commented on a PR
+  generate-test-packages:
+    if: github.event_name == 'issue_comment' && github.event.issue.pull_request
+    uses: linuxmint/github-actions/.github/workflows/generate-test-packages.yml@master
+    secrets: inherit
+    with:
+      comment_body: ${{ github.event.comment.body }}
+      comment_user: ${{ github.event.comment.user.login }}
+      comment_id: ${{ github.event.comment.id }}
+      issue_number: ${{ github.event.issue.number }}
+      ############################## Comma separated list - like 'linuxmint/xapp, linuxmint/cinnamon-desktop'
+      dependencies: linuxmint/cinnamon-desktop