ci: bump MSRV to 1.85

Author: dignifiedquire

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ env:
   RUST_BACKTRACE: 1
   RUSTFLAGS: -Dwarnings
   RUSTDOCFLAGS: -Dwarnings
-  MSRV: "1.81"
+  MSRV: "1.85"
   RS_EXAMPLES_LIST: "dumbpipe-web,extism/host,extism/iroh-extism-host-functions,extism/plugin,iroh-automerge,iroh-automerge-repo,iroh-gateway,frosty,browser-echo,framed-messages,custom-router"
   WASM_EXAMPLES_LIST: "browser-echo"
   IROH_FORCE_STAGING_RELAYS: "1"