Bump alpine from 3.18.2 to 3.18.5

Bumps alpine from 3.18.2 to 3.18.5.

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

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

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.18.2
+FROM alpine:3.18.5
 RUN apk add --no-cache coreutils gcc libc-dev make python3
 WORKDIR /opt/test-runner
 COPY . .