Bump GitHub Actions (#786)

Signed-off-by: Hugo van Kemenade <[email protected]>

.github/workflows/integration-unreleased.yml

@@ -12,7 +12,7 @@ jobs:
         
     steps:
       - name: Checkout OpenSearch
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: opensearch-project/opensearch
           ref: ${{ matrix.opensearch_ref }}
@@ -30,7 +30,7 @@ jobs:
           path: opensearch/distribution/archives/linux-tar/build/distributions
           key: ${{ steps.get-key.outputs.key }}
 
-      - uses: actions/setup-java@v3
+      - uses: actions/setup-java@v4
         with:
           distribution: 'temurin' # See 'Supported distributions' for available options
           java-version: '11'
@@ -55,7 +55,7 @@ jobs:
           for attempt in {1..20}; do sleep 5; if curl -s localhost:9200; then echo '=====> ready'; break; fi; echo '=====> waiting...'; done
 
       - name: Checkout Python Client
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: opensearch-py