ci) use internal checkout action

.gitea/workflows/pr-checks.yml

@@ -9,16 +9,10 @@ jobs:
 
     steps:
       - name: Checkout
-        env:
-          REPO_URL: https://cloud.campbellwireless.net/git/${{ github.repository }}.git
-        run: |
-          set -eux
-          git init .
-          git remote add origin "$REPO_URL"
-          auth="$(printf '%s' '${{ github.actor }}:${{ secrets.GITHUB_TOKEN }}' | base64 | tr -d '\n')"
-          git config --local http.https://cloud.campbellwireless.net/.extraheader "AUTHORIZATION: basic $auth"
-          git fetch --prune --no-recurse-submodules origin +refs/heads/*:refs/remotes/origin/* +refs/tags/*:refs/tags/*
-          git checkout --detach "${{ github.sha }}"
+        uses: https://git.campbellwireless.net/actions/checkout@v1
+        with:
+          server-url: https://cloud.campbellwireless.net/git
+          fetch-depth: 0
 
       - name: Setup Bun
         uses: oven-sh/setup-bun@v2