ci: use rust-cache (#60)

Replace actions/cache with rust-cache.

.github/workflows/ci.yml

@@ -56,15 +56,7 @@ jobs:
       - name: Install Rust
         uses: dtolnay/rust-toolchain@stable
 
-      - name: Cache dependencies
-        uses: actions/cache@v3
-        with:
-          path: |
-            ~/.cargo/registry
-            ~/.cargo/git
-            target
-          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
-          restore-keys: ${{ runner.os }}-cargo-
+      - uses: Swatinem/rust-cache@v2
 
       - name: Run clippy
         run: cargo clippy --all-targets --all-features -- -D warnings
@@ -93,15 +85,7 @@ jobs:
       - name: Create venv for python
         run: uv venv
         
-      - name: Cache dependencies
-        uses: actions/cache@v3
-        with:
-          path: |
-            ~/.cargo/registry
-            ~/.cargo/git
-            target
-          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
-          restore-keys: ${{ runner.os }}-cargo-
+      - uses: Swatinem/rust-cache@v2
 
       - name: Run tests
         run: cargo test --all-features
@@ -117,15 +101,7 @@ jobs:
       - name: Install Rust
         uses: dtolnay/rust-toolchain@stable
 
-      - name: Cache dependencies
-        uses: actions/cache@v3
-        with:
-          path: |
-            ~/.cargo/registry
-            ~/.cargo/git
-            target
-          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
-          restore-keys: ${{ runner.os }}-cargo-
+      - uses: Swatinem/rust-cache@v2
 
       - name: Cargo login
         run: cargo login ${{ secrets.CRATES_TOKEN }}
@@ -146,4 +122,4 @@ jobs:
       - name: Publish rmcp
         if: ${{ startsWith(github.ref, 'refs/tags/release') }}
         continue-on-error: true 
-        run: cargo publish -p rmcp 
+        run: cargo publish -p rmcp