fix: set git identity for the action (#3)

Author: RoyalOughtness

.github/workflows/upstream-sync.yml

@@ -38,6 +38,8 @@ jobs:
         env:
           FEDORA_VERSION: 42
         run: |
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git config user.name "github-actions[bot]"
           git remote add 'upstream' 'https://github.com/fedora-selinux/selinux-policy.git'
           git fetch --tags 'upstream'
           latest_tag=$(git tag -l "v${FEDORA_VERSION}.*" --sort='-creatordate' | head -n1)