Pin dependencies (#7545)

renovate[bot] · web-flow · commit 7bcea821aa33 · 2023-11-17T10:44:02.000+01:00
Co-authored-by: renovate[bot] &lt;29139614+renovate[bot]@users.noreply.github.com&gt;
diff --git a/backend.Dockerfile b/backend.Dockerfile
@@ -1,5 +1,5 @@
 # renovate: datasource=github-tags depName=rust lookupName=rust-lang/rust
-ARG RUST_VERSION=1.74.0
+ARG RUST_VERSION=1.74.0@sha256:47045897a478b674df2213f0bf27b059dbfc4129328240e22529658d7dd7bd28
 
 FROM rust:$RUST_VERSION
 
