Update comment in ci.yml

Author: taiki-e

.github/workflows/ci.yml

@@ -91,7 +91,7 @@ jobs:
     strategy:
       matrix:
         # When updating this, the reminder to update the minimum supported
-        # Rust version in Cargo.toml and .clippy.toml.
+        # Rust version in Cargo.toml.
         rust: ['1.46']
     steps:
       - uses: actions/checkout@v3