chore(deps): update actions/cache digest to 640a1c2 (#1485)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/merge.yml

@@ -33,7 +33,7 @@ jobs:
         server-password: ${{ secrets.OSSRH_PASSWORD }}
 
     - name: Cache local Maven repository
-      uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684
+      uses: actions/cache@640a1c2554105b57832a23eea0b4672fc7a790d5
       with:
         path: ~/.m2/repository
         key: ${{ runner.os }}-17-maven-${{ hashFiles('**/pom.xml') }}

.github/workflows/pullrequest.yml

@@ -34,7 +34,7 @@ jobs:
           languages: java
 
       - name: Cache local Maven repository
-        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684
+        uses: actions/cache@640a1c2554105b57832a23eea0b4672fc7a790d5
         with:
             path: ~/.m2/repository
             key: ${{ runner.os }}${{ matrix.build.java }}-maven-${{ hashFiles('**/pom.xml') }}