upgrade cache version in pipeline (#17)

Author: atakavci

.github/workflows/core_integration.yml

@@ -35,7 +35,7 @@ jobs:
           java-version: '8'
           distribution: 'temurin'
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: |
             ~/.m2/repository

.github/workflows/core_snapshot.yml

@@ -28,7 +28,7 @@
             server-username: MAVEN_USERNAME
             server-password: MAVEN_PASSWORD
         - name: Cache dependencies
-          uses: actions/cache@v2
+          uses: actions/cache@v4
           with:
             path: |
               ~/.m2/repository

.github/workflows/entraid_integration.yml

@@ -34,7 +34,7 @@ jobs:
           java-version: '8'
           distribution: 'temurin'
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: |
             ~/.m2/repository

.github/workflows/entraid_snapshot.yml

@@ -29,7 +29,7 @@
             server-username: MAVEN_USERNAME
             server-password: MAVEN_PASSWORD
         - name: Cache dependencies
-          uses: actions/cache@v2
+          uses: actions/cache@v4
           with:
             path: |
               ~/.m2/repository