chore(deps): update alpine docker tag to v3.21.2 (#910)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Dockerfile

@@ -53,7 +53,7 @@ RUN cargo build --target x86_64-unknown-linux-musl --release -p openstack_cli
 
 ################
 ##### Runtime
-FROM alpine:3.21.0@sha256:21dc6063fd678b478f57c0e13f47560d0ea4eeba26dfc947b2a4f81f686b9f45 AS runtime
+FROM alpine:3.21.2@sha256:56fa17d2a7e7f168a043a2712e63aed1f8543aeafdcee47c58dcffe38ed51099 AS runtime
 
 LABEL maintainer="Artem Goncharov"