Bump alpine from 4bcff63 to 2510918 in /images/k8s_hc_sidecar

Bumps alpine from `4bcff63` to `2510918`.

---
updated-dependencies:
- dependency-name: alpine
  dependency-version: '3'
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

images/k8s_hc_sidecar/Dockerfile

@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:1.3-labs
-FROM alpine:3@sha256:4bcff63911fcb4448bd4fdacec207030997caf25e9bea4045fa6c8c44de311d1
+FROM alpine:3@sha256:25109184c71bdad752c8312a8623239686a9a2071e8825f20acb8f2198c3f659
 
 RUN apk add --no-cache bash netcat-openbsd jq curl ts expect