chore(deps): update docker.io/library/alpine docker tag to v3.20.3

Dockerfile

@@ -1,5 +1,5 @@
 # NOTE: also update the renovate comment below if you change the minor version!
-FROM docker.io/library/alpine:3.20.2@sha256:0a4eaa0eecf5f8c050e5bba433f58c052be7587ee8af3e8b3910ef9ab5fbe9f5
+FROM docker.io/library/alpine:3.20.3@sha256:d92eaec1308e111c3623b46df740297b4b9021355d3f1d491a1398ee8f640ebf
 
 # renovate: datasource=repology depName=alpine_3_20/clamav versioning=loose
 ENV CLAMAV_VERSION="1.2.2-r0"