Fix builds on MacOS ARM64 with Java 8 (Temurin).

- macos-latest is an arm64 runner, and  'temurin' has no support for Java 8
- Force 'x64' architecture on macos-latest since Rosetta layer should
  provide necessary support

Signed-off-by: Roland Grunberg <rgrunber@redhat.com>

.github/workflows/pr-verify.yml

@@ -25,6 +25,7 @@ jobs:
       with:
         java-version: '8'
         distribution: 'temurin'
+        architecture: ${{ matrix.os == 'macos-latest' && 'x64' || '' }}
         cache: 'maven'
     - name: Run Tests
-      run: ./mvnw -B '-Dlemminx.cacheInRepoDir' clean verify
+      run: ./mvnw -B '-Dlemminx.cacheInRepoDir' clean verify