Update docker.io/library/rust Docker tag to v1.85 (stable/zed)

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Renovate-Branch: renovate/stable/zed-docker.io-library-rust-1.x
Change-Id: I2120a16b147a0f534a248c6ff5b339da2cbe5b03
diff --git a/docker-bake.hcl b/docker-bake.hcl
index 41b6d41..a14a4d1 100644
--- a/docker-bake.hcl
+++ b/docker-bake.hcl
@@ -21,7 +21,7 @@
 
     contexts = {
         "runtime" = "docker-image://docker.io/library/debian:bullseye-slim"
-        "rust" = "docker-image://docker.io/library/rust:1.84-bullseye"
+        "rust" = "docker-image://docker.io/library/rust:1.85-bullseye"
         "src" = "./crates/ovsinit"
     }
 }