fix(ci): clean up workflow path filters

Remove non-existent action.yaml paths from action-security workflow.
Fix glob patterns (**.md → **/*.md) in pr-lint workflow.
Remove unused trigger paths (yarn.lock, pnpm-lock.yaml,
requirements.txt, .github/labels.yml, docs/**) from security-suite
and sync-labels workflows.

.github/workflows/pr-lint.yml

@@ -8,19 +8,17 @@ on:
       - main
       - master
     paths-ignore:
-      - '**.md'
-      - 'docs/**'
+      - '**/*.md'
       - '.github/*.md'
-      - 'LICENSE'
+      - 'LICENSE.md'
   pull_request:
     branches:
       - main
       - master
     paths-ignore:
-      - '**.md'
-      - 'docs/**'
+      - '**/*.md'
       - '.github/*.md'
-      - 'LICENSE'
+      - 'LICENSE.md'
   merge_group:
 
 env: