Update alpine Docker tag to v3.22

Update alpine from 3.21 to 3.22

Change-type: patch

Author: balena-renovate[bot]

docker-compose.test.yml

@@ -17,7 +17,7 @@ services:
       - proxy
 
   sut:
-    image: alpine:3.21
+    image: alpine:3.22
     entrypoint:
       - /bin/sh
       - -c