ci: pin GitHub Actions to full-length commit SHAs

Pin actions/checkout and actions/setup-java to commit SHAs
to comply with rootlyhq org policy requiring pinned actions.

Author: kwent

.github/workflows/maven.yml

@@ -19,9 +19,9 @@ jobs:
       matrix:
         java: [ 17, 21 ]
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
     - name: Set up JDK
-      uses: actions/setup-java@v4
+      uses: actions/setup-java@c1e323688fd81a25caa38c78aa6df2d33d3e20d9 # v4
       with:
         java-version: ${{ matrix.java }}
         distribution: 'temurin'

.github/workflows/publish.yml

@@ -9,9 +9,9 @@ jobs:
   test-and-publish:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
       - name: Set up JDK
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@c1e323688fd81a25caa38c78aa6df2d33d3e20d9 # v4
         with:
           java-version: '17'
           distribution: 'temurin'

.github/workflows/test.yml

@@ -9,9 +9,9 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
       - name: Set up JDK
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@c1e323688fd81a25caa38c78aa6df2d33d3e20d9 # v4
         with:
           java-version: '17'
           distribution: 'temurin'