chore(docs): fix missing commas in api object (#1825)

Author: chriscerie

docs/src/pages/common/imperatives-and-refs.mdx

@@ -80,9 +80,9 @@ const api = {
     // Cancel some or all animations depending on the keys passed, no keys will cancel all.
     stop: (cancel, keys) => this,
     // pause specific spring keys of the spring function
-    pause: (keys) => this
+    pause: (keys) => this,
     // resume specific spring keys of the spring function
-    resume: (keys) => this
+    resume: (keys) => this,
 }
 ```