Downgrade actions/setup-java v3.7.0 -> v3.6.0 (#392)

This reverts commit 5afa7e1878. Tag v3.7.0 was
deleted; see actions/setup-java#422 for details.

.github/workflows/build.yaml

@@ -37,7 +37,7 @@ jobs:
       - name: Check out code
         uses: actions/checkout@v3.1.0
       - name: Set up JDK
-        uses: actions/setup-java@v3.7.0
+        uses: actions/setup-java@v3.6.0
         with:
           java-version: ${{ matrix.jdk }}
           distribution: ${{ matrix.distribution }}

.github/workflows/pitest-analyze-pr.yml

@@ -16,7 +16,7 @@ jobs:
         with:
           fetch-depth: 2
       - name: Set up JDK
-        uses: actions/setup-java@v3.7.0
+        uses: actions/setup-java@v3.6.0
         with:
           java-version: 17.0.4
           distribution: temurin

.github/workflows/pitest-update-pr.yml

@@ -20,7 +20,7 @@ jobs:
       - name: Check out code
         uses: actions/checkout@v3.1.0
       - name: Set up JDK
-        uses: actions/setup-java@v3.7.0
+        uses: actions/setup-java@v3.6.0
         with:
           java-version: 17.0.4
           distribution: temurin