fix: update paths in workflow to correctly exclude markdown files

Author: torhakon

.github/workflows/validatePackageChangesOnPr.yml

@@ -3,7 +3,8 @@ on:
   pull_request:
     types: [opened, ready_for_review, reopened]
     paths:
-      - src/**
+      - 'src/**'
+      - '!src/**/*.md'
   workflow_dispatch:
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref_name }}