chore(deps): update gcr.io/cloud-builders/docker docker digest to a20…

…9d5c (#1983)

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This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| gcr.io/cloud-builders/docker | digest | `b9540e0` -> `a209d5c` |

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cloudbuild.yaml

@@ -19,7 +19,7 @@ steps:
       ]
 
   # Step 3: Tag image
-  - name: gcr.io/cloud-builders/docker@sha256:b9540e02c9e9cdc2678eac674e98c294fbcc078085706dbe6a90d1be41d9f0fb
+  - name: gcr.io/cloud-builders/docker@sha256:a209d5caa0fd953f0133d1fc1be0e7940fc29052d35da53786b29911575e3c40
     id: tag-sha
     waitFor:
       - build
@@ -29,7 +29,7 @@ steps:
       - asia-south2-docker.pkg.dev/$PROJECT_ID/docker-registry/$_SERVICE_NAME:$COMMIT_SHA
 
   # Step 3: Tag image
-  - name: gcr.io/cloud-builders/docker@sha256:b9540e02c9e9cdc2678eac674e98c294fbcc078085706dbe6a90d1be41d9f0fb
+  - name: gcr.io/cloud-builders/docker@sha256:a209d5caa0fd953f0133d1fc1be0e7940fc29052d35da53786b29911575e3c40
     waitFor:
       - build
     args:
@@ -38,7 +38,7 @@ steps:
       - asia-south2-docker.pkg.dev/$PROJECT_ID/docker-registry/$_SERVICE_NAME:$BRANCH_NAME
 
   # Step 3: Tag image
-  - name: gcr.io/cloud-builders/docker@sha256:b9540e02c9e9cdc2678eac674e98c294fbcc078085706dbe6a90d1be41d9f0fb
+  - name: gcr.io/cloud-builders/docker@sha256:a209d5caa0fd953f0133d1fc1be0e7940fc29052d35da53786b29911575e3c40
     waitFor:
       - build
     args:
@@ -47,7 +47,7 @@ steps:
       - asia-south2-docker.pkg.dev/$PROJECT_ID/docker-registry/$_SERVICE_NAME:latest
 
   # Step 4: Push a Docker image
-  - name: gcr.io/cloud-builders/docker@sha256:b9540e02c9e9cdc2678eac674e98c294fbcc078085706dbe6a90d1be41d9f0fb
+  - name: gcr.io/cloud-builders/docker@sha256:a209d5caa0fd953f0133d1fc1be0e7940fc29052d35da53786b29911575e3c40
     id: push
     waitFor:
       - tag-sha