tools: Add build as a valid prefix for commit messages

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>

.github/commitlint.config.js

@@ -10,6 +10,7 @@ module.exports = {
 				'babeld',
 				'bfdd',
 				'bgpd',
+				'build',
 				'doc',
 				'docker',
 				'eigrpd',

.github/workflows/commitlint.yml

@@ -13,6 +13,9 @@ jobs:
       contents: read
     runs-on: ubuntu-latest
     steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
       - name: Check Commit
         uses: wagoid/commitlint-github-action@v5
         with: