security: add explicit permissions to bump-version workflow

Co-authored-by: egorsmkv <7875085+egorsmkv@users.noreply.github.com>

Author: Copilot

.github/workflows/bump-version.yaml

@@ -9,6 +9,9 @@ on:
 jobs:
   bump:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
     steps:
       - name: Checkout source
         uses: actions/checkout@v4