ci: ensure electrs job runs esplora

Author: satsfy

.github/workflows/rust.yaml

@@ -203,7 +203,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: Swatinem/rust-cache@v2
       - uses: dtolnay/rust-toolchain@stable
-      - run: cd electrsd && RUST_LOG=debug cargo test --features ${{ matrix.features }}
+      - run: cd electrsd && RUST_LOG=debug cargo test --no-default-features --features ${{ matrix.features }}
 
   test-electrs-no-download:
     name: Test Electrs no auto-download features