Fix a typo s/iscalled/is called

Noticed when looking at #3537 but it was too late to suggest an edit.

fastlane/Fastfile

@@ -453,7 +453,7 @@ platform :android do
     is_beta = beta_version?(version)
     unless skip_prechecks
       # Match branch names that begin with `release/`
-      # Skip this check on CI because that action relies on CI env vars, but when this lane iscalled as part of `code_freeze` the branch changed since the CI build started, so that wouldn't work
+      # Skip this check on CI because that action relies on CI env vars, but when this lane is called as part of `code_freeze` the branch changed since the CI build started, so that wouldn't work
       ensure_git_branch(branch: '^release/') unless is_ci
 
       UI.important("Building version #{version_name_current} (#{build_code_current}) for upload to Google Play Console")