ci: run toolchain action before caching

.github/workflows/ci.yml

@@ -22,6 +22,13 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
+      - name: Toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.rust }}
+          override: true
+
       - name: Cache cargo registry
         uses: actions/cache@v1
         with:
@@ -34,13 +41,6 @@ jobs:
           path: ~/.cargo/git
           key: ${{ runner.os }}-cargo-index-${{ hashFiles('Cargo.lock') }}
 
-      - name: Toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: ${{ matrix.rust }}
-          override: true
-
       - name: Build
         run: cargo build --verbose