Bump gradle/actions from 4.4.4 to 6.0.1 (#6)

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -28,7 +28,7 @@ jobs:
           java-version: ${{ matrix.java }}
 
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@748248ddd2a24f49513d8f472f81c3a07d4d50e1 # v4.4.4
+        uses: gradle/actions/setup-gradle@39e147cb9de83bb9910b8ef8bd7fff0ee20fcd6f # v6.0.1
 
       - name: Check formatting
         run: ./gradlew ktlintCheck
@@ -60,7 +60,7 @@ jobs:
         with:
           distribution: 'temurin'
           java-version: 21
-      - uses: gradle/actions/setup-gradle@748248ddd2a24f49513d8f472f81c3a07d4d50e1 # v4.4.4
+      - uses: gradle/actions/setup-gradle@39e147cb9de83bb9910b8ef8bd7fff0ee20fcd6f # v6.0.1
 
       - name: Test okapi-spring-boot
         run: >-
@@ -81,7 +81,7 @@ jobs:
         with:
           distribution: 'temurin'
           java-version: 21
-      - uses: gradle/actions/setup-gradle@748248ddd2a24f49513d8f472f81c3a07d4d50e1 # v4.4.4
+      - uses: gradle/actions/setup-gradle@39e147cb9de83bb9910b8ef8bd7fff0ee20fcd6f # v6.0.1
 
       - name: Test okapi-kafka
         run: ./gradlew :okapi-kafka:test -PkafkaVersion=${{ matrix.kafka }}