refactor: Change GitHub Action version to address deprecation of v1/v2

.github/workflows/nebula-ci.yml

@@ -21,14 +21,14 @@ jobs:
         uses: actions/setup-java@v1
         with:
           java-version: ${{ matrix.java }}
-      - uses: actions/cache@v1
+      - uses: actions/cache@v4
         id: gradle-cache
         with:
           path: ~/.gradle/caches
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/gradle/dependency-locks/*.lockfile') }}
           restore-keys: |
             - ${{ runner.os }}-gradle-
-      - uses: actions/cache@v1
+      - uses: actions/cache@v4
         id: gradle-wrapper-cache
         with:
           path: ~/.gradle/wrapper

.github/workflows/nebula-publish.yml

@@ -14,14 +14,14 @@ jobs:
         uses: actions/setup-java@v1
         with:
           java-version: 1.8
-      - uses: actions/cache@v1
+      - uses: actions/cache@v4
         id: gradle-cache
         with:
           path: ~/.gradle/caches
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/gradle/dependency-locks/*.lockfile') }}
           restore-keys: |
             - ${{ runner.os }}-gradle-
-      - uses: actions/cache@v1
+      - uses: actions/cache@v4
         id: gradle-wrapper-cache
         with:
           path: ~/.gradle/wrapper

.github/workflows/nebula-snapshot.yml

@@ -16,13 +16,13 @@ jobs:
         uses: actions/setup-java@v1
         with:
           java-version: 8
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         id: gradle-cache
         with:
           path: |
             ~/.gradle/caches
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         id: gradle-wrapper-cache
         with:
           path: |