rename verify step

Author: ktoso

.github/workflows/pull_request.yml

@@ -128,7 +128,7 @@ jobs:
             ${{ runner.os }}-swiftpm-
       - name: Test Swift
         run: "swift test"
-      - name: Build (Swift) Sample Apps
+      - name: Verify Samples (All)
         run: .github/scripts/validate_samples.sh
         # TODO: Benchmark compile crashes in CI, enable when nightly toolchains in better shape.
         # - name: Build (Swift) Benchmarks