Use lint on MSRV instead of stable

Author: cecton

.github/workflows/rust.yml

@@ -24,7 +24,7 @@ jobs:
           - 1.70.0 # cli MSRV
         include:
           - os: ubuntu-latest
-            rust: stable
+            rust: msrv
             lint: 1
           - rust: stable
             rust-args: --all-features
@@ -49,8 +49,6 @@ jobs:
           cargo --version
           rustc --version --verbose
 
-      - uses: Swatinem/rust-cache@v2
-
       - name: cargo test
         run: cargo test --workspace ${{ matrix.rust-args }}