bump squid to 6.8

Bumps [actions/cache](https://github.com/actions/cache) from 4.0.0 to 4.0.1.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](https://github.com/actions/cache/compare/v4.0.0...v4.0.1)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

.github/workflows/dockerimage.yml

@@ -39,7 +39,7 @@ jobs:
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Cache Docker layers
-        uses: actions/cache@v4.0.0
+        uses: actions/cache@v4.0.1
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-${{ github.sha }}
@@ -153,7 +153,7 @@ jobs:
         uses: docker/setup-buildx-action@v3
 
       - name: Cache Docker layers
-        uses: actions/cache@v4.0.0
+        uses: actions/cache@v4.0.1
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-${{ github.sha }}

Dockerfile

@@ -1,6 +1,6 @@
 FROM alpine:3.19.1 as build
 
-ARG SQUID_VER=6.7
+ARG SQUID_VER=6.8
 
 RUN set -x && \
 	apk add --no-cache  \