build: use correct secret name

Signed-off-by: Philipp Burckhardt <[email protected]>

Author: Planeshifter

.github/workflows/cleanup_coverage.yml

@@ -169,7 +169,7 @@ jobs:
           commit-message: 'chore: cleanup coverage directories'
           committer: 'stdlib-bot <[email protected]>'
           signoff: true
-          token: ${{ secrets.STDLIB_BOT_PAT_REPO_WRITE }}
+          token: ${{ secrets.STDLIB_BOT_FGPAT_PR_WRITE }}
           labels: |
             automated-pr
           team-reviewers: |