Update Rust Dockerfile version

Signed-off-by: Kate Goldenring <[email protected]>

build/containers/Dockerfile.rust

@@ -1,6 +1,6 @@
 FROM --platform=$BUILDPLATFORM tonistiigi/xx:master AS xx
 
-FROM  --platform=$BUILDPLATFORM rust:1.74-slim-bookworm AS build
+FROM  --platform=$BUILDPLATFORM rust:1.79-slim-bookworm AS build
 RUN rustup component add rustfmt
 RUN apt-get update && apt-get install -y clang lld protobuf-compiler pkg-config mmdebstrap wget
 COPY --from=xx / /