Bump alpine from 3.17.3 to 3.18.2

Bumps alpine from 3.17.3 to 3.18.2.

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

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

Dockerfile

@@ -51,7 +51,7 @@ WORKDIR /languagetool
 
 # Note: When changing the base image, verify that the hunspell.sh workaround is
 # downloading the matching version of `libhunspell`. The URL may need to change.
-FROM alpine:3.17.3
+FROM alpine:3.18.2
 
 RUN apk add --no-cache \
     bash \