another little rename for aesthetics

.github/workflows/check.yml

@@ -3,7 +3,7 @@ on: [push, pull_request]
 name: check
 
 jobs:
-  check-stable:
+  stable:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -13,7 +13,7 @@ jobs:
       - run: cargo fmt --all -- --check
       - run: cargo clippy --all-features -- -D warnings
       - run: cargo test --all-features
-  check-nightly:
+  nightly:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4