Add cargo example

README.md

@@ -57,6 +57,26 @@ jobs:
 
 See [Examples](examples.md)
 
+### Rust - Cargo
+
+```
+- name: Cache cargo registry
+  uses: actions/cache@preview
+  with:
+    path: ~/.cargo/registry
+    key: ${{ runner.os }}-cargo-registry
+- name: Cache cargo index
+  uses: actions/cache@preview
+  with:
+    path: ~/.cargo/git
+    key: ${{ runner.os }}-cargo-index
+- name: Cache cargo build
+  uses: actions/cache@preview
+  with:
+    path: target
+    key: ${{ runner.os }}-cargo-build-target
+```
+
 ## Cache Limits
 
 Individual caches are limited to 200MB and a repository can have up to 2GB of caches. Once the 2GB limit is reached, older caches will be evicted based on when the cache was last accessed.