chore(deps): update dependency docker.io/envoyproxy/envoy-alpine to v1.21.2

Author: renovate-bot

config/envs/development/kustomization.yaml

@@ -68,7 +68,7 @@ images:
     newTag: 11.5-alpine
   - name: envoyproxy/envoy-alpine
     newName: docker.io/envoyproxy/envoy-alpine
-    newTag: v1.15.0
+    newTag: v1.21.2
   - name: micro/micro
     newName: docker.pkg.github.com/xmlking/micro-starter-kit/micro
     newTag: v2.9.3

config/envs/local/kustomization.yaml

@@ -61,7 +61,7 @@ images:
     newTag: 11.5-alpine
   - name: envoyproxy/envoy-alpine
     newName: docker.io/envoyproxy/envoy-alpine
-    newTag: v1.15.0
+    newTag: v1.21.2
   - name: micro/micro
     newName: docker.pkg.github.com/xmlking/micro-starter-kit/micro
     newTag: v2.9.3

config/envs/production/kustomization.yaml

@@ -74,7 +74,7 @@ images:
     newTag: 11.5-alpine
   - name: envoyproxy/envoy-alpine
     newName: docker.io/envoyproxy/envoy-alpine
-    newTag: v1.15.0
+    newTag: v1.21.2
   - name: micro/micro
     newName: docker.pkg.github.com/xmlking/micro-starter-kit/micro
     newTag: v2.9.3

config/envs/staging/kustomization.yaml

@@ -62,7 +62,7 @@ images:
     newTag: 11.5-alpine
   - name: envoyproxy/envoy-alpine
     newName: docker.io/envoyproxy/envoy-alpine
-    newTag: v1.15.0
+    newTag: v1.21.2
   - name: micro/micro
     newName: docker.pkg.github.com/xmlking/micro-starter-kit/micro
     newTag: v2.9.3