add cargo cache

.gitea/workflows/cargo.yaml

@@ -4,11 +4,20 @@ on: [push]
 
 jobs:
   build:
+    env:
+      RUNNER_TOOL_CACHE: /toolcache
     runs-on: rust-latest
     steps:
       - name: Check out repository code
         uses: actions/checkout@v4
-
+      - name: Cargo target cache
+        uses: actions/cache@v1
+        with:
+          path: target
+          key: ${{ runner.os }}-cargo-target-${{ hashFiles('**/Cargo.toml') }}-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-cargo-target-${{ hashFiles('**/Cargo.toml') }}
+            ${{ runner.os }}-cargo-target
       - name: Build project
         uses: actions-rs/cargo@v1
         with: