Escape "+"s in on.workflow_run.workflows

Author: henrymercer

.github/workflows/deflake.yml

@@ -27,9 +27,9 @@ on:
       - "PR Check - Bundle: From nightly"
       - "PR Check - Bundle: From toolcache"
       - "PR Check - Bundle: Zstandard checks"
-      - "PR Check - C/C++: autoinstalling dependencies (Linux)"
-      - "PR Check - C/C++: autoinstalling dependencies is skipped (macOS)"
-      - "PR Check - C/C++: disabling autoinstalling dependencies (Linux)"
+      - "PR Check - C/C\\+\\+: autoinstalling dependencies (Linux)"
+      - "PR Check - C/C\\+\\+: autoinstalling dependencies is skipped (macOS)"
+      - "PR Check - C/C\\+\\+: disabling autoinstalling dependencies (Linux)"
       - "PR Check - Clean up database cluster directory"
       - "PR Check - CodeQL Bundle All"
       - "PR Check - Config export"