chore(deps): update alpine docker tag to v20240923 (#163)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| alpine | final | major | `20240807` -> `20240923` |

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Dockerfile

@@ -1,4 +1,4 @@
 FROM scratch
-COPY --from=alpine:20240807 --link /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=alpine:20240923 --link /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
 COPY cloudflare-dynamic-dns /
 ENTRYPOINT ["/cloudflare-dynamic-dns"]