bump rust to 1.77 (requires lipo update)

bumping rust to 1.77 requires a lipo update with
`cargo install cargo-lipo`
due to a recent change with cargo metadata,
see TimNN/cargo-lipo#61

(update should say
`Replaced package 'cargo-lipo v3.2.0' with 'cargo-lipo v3.3.0'`
on success)

rust-toolchain

@@ -1 +1 @@
-1.73.0
+1.77.0