Fix CI: Revert to stable toolchain (1.93+) and update wasm-bindgen

This commit reverts the CI workflows to use the `stable` Rust toolchain, as stable is now 1.93.0 which satisfies `wgpu` v28 requirements.
It also updates the `wasm-bindgen` dependency in `crates/Cargo.toml` to `0.2.108` to match the version installed by `wasm-bindgen-cli` in the Rust Web workflow, resolving a version mismatch failure.
Reverted changes to `crates/profiler/src/cpu_profiler.rs` as they are not required on stable.

Co-authored-by: gents83 <62186646+gents83@users.noreply.github.com>

Author: google-labs-jules[bot]

crates/profiler/src/cpu_profiler.rs

@@ -161,7 +161,7 @@ impl CpuProfiler {
         let mut thread_data = HashMap::new();
         let locked_data = self.locked_data.lock().unwrap();
         let mut threads: Vec<(&RawThreadId, &ThreadInfo)> = locked_data.threads.iter().collect();
-        threads.sort_by_key(|&a| a.1.name.to_lowercase());
+        threads.sort_by(|&a, &b| a.1.name.to_lowercase().cmp(&b.1.name.to_lowercase()));
         for (&id, t) in threads.iter() {
             thread_data.insert(
                 id,