chore(CI): Add release PR title and sign release commits (#372)

Author: DaughterOfMars

.github/workflows/pr_title.yml

@@ -24,6 +24,7 @@ jobs:
             refactor
             chore
             upstream
+            release
           requireScope: false
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/pre_publish.yml

@@ -70,6 +70,8 @@ jobs:
         with:
           tool: git-cliff
 
+      - uses: chainguard-dev/actions/setup-gitsign@0cda751b114eb55c388e88f7479292668165602a # v1.0.2
+
       - uses: cargo-bins/release-pr@0c019c0e5a6b9f722578d231d43ba900cacc5ffa # v2.1.3
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}