Update toolchain (#897)

Author: haerdib

rust-toolchain.toml

@@ -1,4 +1,4 @@
 [toolchain]
-channel = "nightly-2025-12-08"
+channel = "nightly-2026-08-07"
 targets = ["wasm32-unknown-unknown", "wasm32-wasip1"]
 profile = "default" # include rustfmt, clippy

test-no-std/src/main.rs

@@ -101,7 +101,7 @@ unsafe impl GlobalAlloc for SimpleAllocator {
 		let mut allocated = 0;
 		if self
 			.remaining
-			.fetch_update(SeqCst, SeqCst, |mut remaining| {
+			.try_update(SeqCst, SeqCst, |mut remaining| {
 				if size > remaining {
 					return None;
 				}