ci: update rust cache keys

Signed-off-by: Yuki Kishimoto <[email protected]>

Author: yukibtc

.github/workflows/ci.yml

@@ -20,7 +20,6 @@ jobs:
       - name: Check
         run: bash contrib/scripts/check-fmt.sh check
 
-  # TODO: check MSRV
   check-crates:
     name: Check crates
     runs-on: ubuntu-latest
@@ -63,6 +62,8 @@ jobs:
 
     - name: Rust Cache
       uses: Swatinem/[email protected]
+      with:
+        key: ${{ matrix.crate }}
 
     - name: Check
       run: cargo check -p ${{ matrix.crate }}
@@ -83,8 +84,6 @@ jobs:
 
       - name: Rust Cache
         uses: Swatinem/[email protected]
-        with:
-          key: "check-docs"
 
       - name: Check
         run: bash contrib/scripts/check-docs.sh
@@ -101,8 +100,6 @@ jobs:
 
     - name: Rust Cache
       uses: Swatinem/[email protected]
-      with:
-        key: "build-no-std"
 
     - name: Set default toolchain
       run: rustup default nightly