clean up remaining wait tasks

Author: loongs-zhang

.github/workflows/ci.yml

@@ -92,7 +92,7 @@ jobs:
           x86_64-pc-windows-msvc,
           i686-pc-windows-msvc,
         ]
-        channel: [ stable, nightly ]
+        channel: [ 1.85.0, nightly ]
         include:
           - target: x86_64-unknown-linux-gnu
             os: ubuntu-latest