Fix typo in input description

Author: rhysd

action.yml

@@ -13,7 +13,7 @@ inputs:
     description: 'Name of the artifact group if using uploadArtifacts. default: lighthouse-results'
     default: lighthouse-results
   temporaryPublicStorage:
-    descripton: 'Opt-in to saving Lighthouse results to temporary public storage'
+    description: 'Opt-in to saving Lighthouse results to temporary public storage'
   runs:
     description: 'Number of runs to do per URL'
   serverBaseUrl: