fix: add auto-approval for file writes in polish-release-notes workflow (Fission-AI#505)

The workflow was failing because Claude Code requested permission to write files
(release-title.txt and polished-notes.md) but there was no interactive user to approve.

Added claude_args: "--allowedTools Write,Read" to pre-approve file operations
in automation mode.

Author: TabishB

.github/workflows/polish-release-notes.yml

@@ -36,6 +36,7 @@ jobs:
         with:
           claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
           github_token: ${{ secrets.GITHUB_TOKEN }}
+          claude_args: "--allowedTools Write,Read"
           prompt: |
             Transform the changelog in `current-notes.md` into release notes for OpenSpec ${{ inputs.tag_name }}.