build(deps): bump alpine from a2d49ea to 28bd5fe (#2678)

Bumps alpine from `a2d49ea` to `28bd5fe`.

---
updated-dependencies:
- dependency-name: alpine
  dependency-version: 28bd5fe8b56d1bd048e5babf5b10710ebe0bae67db86916198a6eec434943f8b
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Dockerfile

@@ -1,3 +1,3 @@
-FROM alpine@sha256:a2d49ea686c2adfe3c992e47dc3b5e7fa6e6b5055609400dc2acaeb241c829f4
+FROM alpine@sha256:28bd5fe8b56d1bd048e5babf5b10710ebe0bae67db86916198a6eec434943f8b
 ARG AGENT_DIR
 COPY ${AGENT_DIR} /opt/python