Bump alpine from 3.21.0 to 3.21.2 (#963)

Bumps alpine from 3.21.0 to 3.21.2.

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Dockerfile

@@ -7,7 +7,7 @@ COPY . .
 RUN go mod tidy
 RUN GOOS=linux CGO_ENABLED=0 /usr/local/go/bin/go build -ldflags="-s -w" -o netclient-app .
 
-FROM alpine:3.21.0
+FROM alpine:3.21.2
 
 WORKDIR /root/
 

Dockerfile-netclient-multiarch-userspace

@@ -3,7 +3,7 @@ WORKDIR /app
 COPY . .
 RUN GOOS=linux CGO_ENABLED=0 /usr/local/go/bin/go build -ldflags="-w -s" -o netclient-app .
 
-FROM alpine:3.21.0
+FROM alpine:3.21.2
 
 WORKDIR /root/