Fix typo in ios_lint_localizations unsupported-format warning

Commit 9eabbb0 reworded the warning to "can only occurr" (a typo) without
updating the spec, which still expected the prior "only make sense" text —
leaving `ios_lint_localizations_spec.rb`'s "warns if input files are not in
ASCII-plist format" example failing on `foundation`. Correct the spelling to
"can only occur" and align the spec.

Author: jkmassel

lib/fastlane/plugin/wpmreleasetoolkit/actions/ios/ios_lint_localizations.rb

@@ -62,7 +62,7 @@ def self.find_duplicated_keys(params)
             duplicate_keys[language] = payload.map { |key, value| "`#{key}` was found at multiple lines: #{value.join(', ')}" } unless payload.empty?
           when :unsupported_format
             UI.important <<~WRONG_FORMAT
-              File `#{path}` is in #{payload} format, while finding duplicate keys can only occurr on files that are in ASCII-plist format.
+              File `#{path}` is in #{payload} format, while finding duplicate keys can only occur on files that are in ASCII-plist format.
               Since your files are in #{payload} format, you should probably disable the `check_duplicate_keys` option from this `#{action_name}` call.
             WRONG_FORMAT
           when :unscannable

spec/ios_lint_localizations_spec.rb

@@ -194,7 +194,7 @@ def run_l10n_linter_test(data_file:, check_duplicate_keys: nil, fail_on_strings_
       File.write(File.join(fr_lproj, 'Localizable.strings'), File.read(xml_file))
 
       expected_message = <<~EXPECTED_WARNING
-        File `#{fr_lproj}/Localizable.strings` is in xml format, while finding duplicate keys only make sense on files that are in ASCII-plist format.
+        File `#{fr_lproj}/Localizable.strings` is in xml format, while finding duplicate keys can only occur on files that are in ASCII-plist format.
         Since your files are in xml format, you should probably disable the `check_duplicate_keys` option from this `ios_lint_localizations` call.
       EXPECTED_WARNING
       expect(FastlaneCore::UI).to receive(:important).with(expected_message)