chore(deps): update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/go.yml

@@ -25,7 +25,7 @@ jobs:
           KAFKA_LISTENERS: PLAINTEXT://0.0.0.0:9092
           KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Set up Go
       uses: actions/setup-go@v2