Chore(deps): Bump alpine from 3.15.3 to 3.15.4

Bumps alpine from 3.15.3 to 3.15.4.

---
updated-dependencies:
- dependency-name: alpine
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Dockerfile

@@ -1,7 +1,7 @@
 #######################################
 # image for dev build environment
 ######################################
-FROM alpine:3.15.3 as dev
+FROM alpine:3.15.4 as dev
 
 ARG GH_CLI_VER=2.3.0