ci: set the github token for embedded postgresql

The embedded postgresql dependency requires using the github API.

Not having a github token makes this an unauthenticated request, which
has stricter API rate limits. Providing the github token show raise
those limits.

.github/workflows/ci.yaml

@@ -55,6 +55,7 @@ jobs:
       - name: Test
         run: cargo test --all-features -- --nocapture
         env:
+          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}" # for embedded postgresql
           RUST_LOG: warn,sqlx=error,sea_orm=error
           RUST_MIN_STACK: 50000000 # 50 MB
       - name: Export and Validate Generated Openapi Spec