Update ghcr.io/nginxinc/kic-test-grpc-server Docker tag to v0.2.4 (#2969)

| datasource | package                               | from  | to    |
| ---------- | ------------------------------------- | ----- | ----- |
| docker     | ghcr.io/nginxinc/kic-test-grpc-server | 0.2.3 | 0.2.4 |

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Diff for: examples/grpc-routing/helloworld.yaml

@@ -28,7 +28,7 @@ spec:
     spec:
       containers:
       - name: grpc-infra-backend-v1
-        image: ghcr.io/nginxinc/kic-test-grpc-server:0.2.3
+        image: ghcr.io/nginxinc/kic-test-grpc-server:0.2.4
         env:
         - name: POD_NAME
           valueFrom:

Diff for: tests/suite/manifests/clientsettings/grpc-backend.yaml

@@ -28,7 +28,7 @@ spec:
     spec:
       containers:
       - name: grpc-backend
-        image: ghcr.io/nginxinc/kic-test-grpc-server:0.2.3
+        image: ghcr.io/nginxinc/kic-test-grpc-server:0.2.4
         env:
         - name: POD_NAME
           valueFrom:

Diff for: tests/suite/manifests/snippets-filter/grpc-backend.yaml

@@ -28,7 +28,7 @@ spec:
     spec:
       containers:
       - name: grpc-backend
-        image: ghcr.io/nginxinc/kic-test-grpc-server:0.2.3
+        image: ghcr.io/nginxinc/kic-test-grpc-server:0.2.4
         env:
         - name: POD_NAME
           valueFrom:

Diff for: tests/suite/manifests/upstream-settings-policy/grpc-backend.yaml

@@ -28,7 +28,7 @@ spec:
     spec:
       containers:
       - name: grpc-backend
-        image: ghcr.io/nginxinc/kic-test-grpc-server:0.2.3
+        image: ghcr.io/nginxinc/kic-test-grpc-server:0.2.4
         env:
         - name: POD_NAME
           valueFrom: