Bump alpine from 3.21.2 to 3.21.3

Bumps alpine from 3.21.2 to 3.21.3.

---
updated-dependencies:
- dependency-name: alpine
  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@v4.2.0
+        uses: actions/cache@v4.2.2
         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@v4.2.0
+        uses: actions/cache@v4.2.2
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-${{ github.sha }}

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.21.2 as build
+FROM alpine:3.21.3 as build
 
 ARG SQUID_VER=6.13
 
@@ -106,7 +106,7 @@ RUN sed -i '1s;^;include /etc/squid/conf.d/*.conf\n;' /etc/squid/squid.conf && \
 
 # --- --- --- --- --- --- --- --- ---
 
-FROM alpine:3.21.2
+FROM alpine:3.21.3
 	
 ENV SQUID_CONFIG_FILE /etc/squid/squid.conf
 ENV TZ Europe/Moscow