Install zstd

.gitea/workflows/ci.yml

@@ -9,6 +9,12 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
+      - name: Install system dependencies
+        run: |
+          # zstd is an optional dep of actions/cache@v3
+          apt-get -y update
+          apt-get -y install zstd
+
       - name: Cache Rust
         uses: actions/cache@v3
         with:
@@ -60,8 +66,9 @@ jobs:
 
       - name: Install system dependencies
         run: |
+          # zstd is an optional dep of actions/cache@v3
           apt-get -y update
-          apt-get -y install lld
+          apt-get -y install lld zstd
 
       - name: Cache Rust
         uses: actions/cache@v3