Move back to actions

See https://www.blacksmith.sh/blog/cache

.github/workflows/build-1218.yml

@@ -18,7 +18,7 @@ jobs:
           fetch-depth: 0
 
       - name: Setup Gradle Cache
-        uses: useblacksmith/cache@v5
+        uses: actions/checkout@v4
         with:
           path: |
             ~/.gradle/caches/modules-2
@@ -40,7 +40,7 @@ jobs:
           find ~/.gradle/caches -name "*.lock" -type f -delete || echo "No lock files found"
 
       - name: Setup java
-        uses: useblacksmith/setup-java@v5
+        uses: actions/setup-java@v5
         with:
           distribution: 'temurin'
           java-version: '21'

.github/workflows/build-pr.yml

@@ -15,7 +15,7 @@ jobs:
         uses: actions/checkout@v5
 
       - name: Setup java
-        uses: useblacksmith/setup-java@v5
+        uses: actions/setup-java@v5
         with:
           distribution: 'temurin'
           java-version: '21'