Update README.md (#531)

more logical to read save cache before restore cache

packages/cache/README.md

@@ -10,9 +10,9 @@ Note that GitHub will remove any cache entries that have not been accessed in ov
 
 This package is used by the v2+ versions of our first party cache action. You can find an example implementation in the cache repo [here](https://github.com/actions/cache). 
 
-#### Restore Cache
+#### Save Cache
 
-Restores a cache based on `key` and `restoreKeys` to the `paths` provided. Function returns the cache key for cache hit and returns undefined if cache not found. 
+Saves a cache containing the files in `paths` using the `key` provided. The files would be compressed using zstandard compression algorithm if zstd is installed, otherwise gzip is used. Function returns the cache id if the cache was saved succesfully and throws an error if cache upload fails. 
 
 ```js
 const cache = require('@actions/cache');
@@ -21,16 +21,12 @@ const paths = [
     'packages/*/node_modules/'
 ]
 const key = 'npm-foobar-d5ea0750'
-const restoreKeys = [
-    'npm-foobar-',
-    'npm-'
-]
-const cacheKey = await cache.restoreCache(paths, key, restoreKeys)
+const cacheId = await cache.saveCache(paths, key)
 ```
 
-#### Save Cache
+#### Restore Cache
 
-Saves a cache containing the files in `paths` using the `key` provided. The files would be compressed using zstandard compression algorithm if zstd is installed, otherwise gzip is used. Function returns the cache id if the cache was saved succesfully and throws an error if cache upload fails. 
+Restores a cache based on `key` and `restoreKeys` to the `paths` provided. Function returns the cache key for cache hit and returns undefined if cache not found. 
 
 ```js
 const cache = require('@actions/cache');
@@ -39,6 +35,10 @@ const paths = [
     'packages/*/node_modules/'
 ]
 const key = 'npm-foobar-d5ea0750'
-const cacheId = await cache.saveCache(paths, key)
+const restoreKeys = [
+    'npm-foobar-',
+    'npm-'
+]
+const cacheKey = await cache.restoreCache(paths, key, restoreKeys)
 ```