chore(deps): update rust:1.86.0-alpine3.21 docker digest to 8c042ca (#160)

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

Author: renovate[bot]

Earthfile

@@ -13,7 +13,7 @@ COPY_METADATA:
 
 
 rust-base:
-    FROM rust:1.86.0-alpine3.21@sha256:541a1720c1cedddae9e17b4214075bf57c20bc7b176b4bba6bce3437c44d51ef
+    FROM rust:1.86.0-alpine3.21@sha256:8c042cad9f1a5c481b57503559ec9c3e0fd1d36a26db2d6b0ee36b69fd23cbf2
     RUN apk add --no-cache \
         bash=5.2.37-r0 \
         musl-dev=1.2.5-r9