add pull request source branch to TC trigger call

Author: bigorn0

.github/workflows/trigger-pr-tests-plugins.yml

@@ -1,19 +1,19 @@
 name: Trigger PR tests (Plugins)
 
 on:
-    pull_request:
-        types: [auto_merge_enabled]
+  pull_request:
+    types: [auto_merge_enabled]
 
 jobs:
-    trigger-pr-tests-plugins:
-        name: Trigger PR tests (Plugins)
-        runs-on: ubuntu-latest
-        steps:
-            - name: Call TeamCity API endpoint
-              run: |
-                  curl \
-                    -X POST \
-                    -H 'Authorization: Bearer ${{ secrets.TEAMCITY_TRIGGER_TESTS_TOKEN }}' \
-                    -H 'Content-Type: application/json' \
-                    -d '{"branchName": "pull/${{ github.event.number }}", "buildType": {"id": "${{ vars.TEAMCITY_BUILD_ID_FOR_TESTING_PLUGIN_PR }}"}}' \
-                    ${{ vars.TEAMCITY_API_URL }}/buildQueue
+  trigger-pr-tests-plugins:
+    name: Trigger PR tests (Plugins)
+    runs-on: ubuntu-latest
+    steps:
+      - name: Call TeamCity API endpoint
+        run: |
+          curl \
+            -X POST \
+            -H 'Authorization: Bearer ${{ secrets.TEAMCITY_TRIGGER_TESTS_TOKEN }}' \
+            -H 'Content-Type: application/json' \
+            -d '{"branchName": "pull/${{ github.event.number }}", "sourceBranch": "${{ github.event.pull_request.head.ref }}", "buildType": {"id": "${{ vars.TEAMCITY_BUILD_ID_FOR_TESTING_PLUGIN_PR }}"}}' \
+            ${{ vars.TEAMCITY_API_URL }}/buildQueue