Bump golang from 1.21.1-alpine3.18 to 1.21.2-alpine3.18

Bumps golang from 1.21.1-alpine3.18 to 1.21.2-alpine3.18.

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

Signed-off-by: dependabot[bot] <support@github.com>

Dockerfile

@@ -1,5 +1,5 @@
 
-FROM golang:1.21.1-alpine3.18 as go
+FROM golang:1.21.2-alpine3.18 as go
 
 ENV XCADDY_VERSION v0.3.5
 ENV CADDY_HASH 29233e285b83dfa070d1f6889c021cb32c161b89