Update README.md

Co-authored-by: ccoVeille <[email protected]>

README.md

@@ -552,7 +552,7 @@ Default value: `false`
 #### cache-prefix
 
 Beneficial so the action has a more unique cache key. Useful when calling this action multiple times, independent of each other.
-An example for usage would be closing all PRs with `x` label after 7 days in one action and closing all PRs except for `x` label after 10 days in another.
+An example for usage would be closing all PRs with `x` label after 7 days in one action, and closing all PRs except for `x` label after 10 days in another.
 
 ### Usage