Improve log message when extracting keys

To not only mention the number of keys found in the original file expected to be extracted, but also the number of keys actually extracted (which can be smaller if not all keys have translations for a given locale) to make what is described by the message be more accurate and less misleading

Author: AliSoftware

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

@@ -16,9 +16,9 @@ def self.run(params)
             next if target_strings_file == target_original_file # do not generate/overwrite the original locale itself
 
             keys_to_extract = keys_to_extract_per_target_file[target_original_file]
-            UI.message("Extracting #{keys_to_extract.count} keys into #{target_strings_file}...")
-
             extracted_translations = translations.slice(*keys_to_extract)
+            UI.message("Extracting #{extracted_translations.count} keys (out of #{keys_to_extract.count} expected) into #{target_strings_file}...")
+
             FileUtils.mkdir_p(File.dirname(target_strings_file)) # Ensure path up to parent dir exists, create it if not.
             Fastlane::Helper::Ios::L10nHelper.generate_strings_file_from_hash(translations: extracted_translations, output_path: target_strings_file)
           rescue StandardError => e