fix(ci): use github.token for cross-repo clone

Previous attempt failed with 403 Forbidden because CR_PAT doesn't have
scope for cross-repo access in Gitea actions. Use the built-in
github.token instead, which the runner provides for all repos it can
access.

.gitea/workflows/build.yaml

@@ -18,10 +18,9 @@ jobs:
       - name: Clone schwab-scraper
         run: |
           mkdir -p vendor
-          # Use URL-embedded token for cross-repo access (CR_PAT has registry
-          # scope; actions/checkout@v3's Basic auth header fails with 403).
+          # Use the built-in runner token which has cross-repo access.
           git clone --depth=1 --branch main \
-            "https://${{ gitea.actor }}:${{ secrets.CR_PAT }}@gitea.ext.ben.io/b3nw/schwab-scraper.git" \
+            "https://oauth2:${{ github.token }}@gitea.ext.ben.io/b3nw/schwab-scraper.git" \
             vendor/schwab-scraper
 
       - name: Login to Gitea Container Registry