style: EOF newline for ctx.yml

Author: ErichDonGubler

.github/workflows/cts.yml

@@ -93,4 +93,4 @@ jobs:
               echo "=== Running $test ===";
               DENO_WEBGPU_BACKEND=$backend cargo run --manifest-path ../wgpu/cts_runner/Cargo.toml --frozen -- ./tools/run_deno --verbose "$test";
             done
-          done
+          done