[poc_windows_x86_64_compile] Add cache

Author: efaure

.github/workflows/poc-agent-build.yml

@@ -14,6 +14,14 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v2
 
+    - name: Cache cargo
+      uses: actions/cache@v4
+      with:
+        path: ~/.cargo
+        key: ${{ runner.arch }}-${{ runner.os }}-cargo-cache-${{ hashFiles('**/Cargo.lock') }}
+        restore-keys: |
+          ${{ runner.arch }}-${{ runner.os }}-cargo-cache-
+
     - name: Download rustup-init
       run: curl.exe --output rustup-init.exe --url https://static.rust-lang.org/rustup/dist/x86_64-pc-windows-msvc/rustup-init.exe