Bump alpine from 77726ef to 0a4eaa0

Bumps alpine from `77726ef` to `0a4eaa0`.

---
updated-dependencies:
- dependency-name: alpine
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Dockerfile

@@ -15,7 +15,7 @@ ENV GOOS linux
 RUN go build -a -installsuffix cgo -ldflags '-w  -extldflags "-static"' -o /go/bin/slack-notify main.go
 
 # alpine:latest as of 2024-03-11
-FROM alpine@sha256:77726ef6b57ddf65bb551896826ec38bc3e53f75cdde31354fbffb4f25238ebd
+FROM alpine@sha256:0a4eaa0eecf5f8c050e5bba433f58c052be7587ee8af3e8b3910ef9ab5fbe9f5
 
 COPY --from=builder /go/bin/slack-notify /usr/bin/slack-notify