Update CLI descriptions

Author: rebehe

lib/fastlane/plugin/firebase_app_distribution/actions/firebase_app_distribution_action.rb

@@ -513,12 +513,12 @@ def self.available_options
           # Release Testing
           FastlaneCore::ConfigItem.new(key: :test_devices,
                                        env_name: "FIREBASEAPPDISTRO_TEST_DEVICES",
-                                       description: "List of devices to run automated tests on, in the format 'model=<model-id>,version=<os-version-id>,locale=<locale>,orientation=<orientation>;model=<model-id>,...'. Run 'gcloud firebase test android|ios models list' to see available devices. Note: This feature is in beta.",
+                                       description: "List of devices to run automated tests on, in the format 'model=<model-id>,version=<os-version-id>,locale=<locale>,orientation=<orientation>;model=<model-id>,...'. Run 'gcloud firebase test android|ios models list' to see available devices. Note: This feature is in beta",
                                        optional: true,
                                        type: String),
           FastlaneCore::ConfigItem.new(key: :test_devices_file,
                                        env_name: "FIREBASEAPPDISTRO_TEST_DEVICES_FILE",
-                                       description: "Path to file containing a list of devices to run automated tests on, in the format 'model=<model-id>,version=<os-version-id>,locale=<locale>,orientation=<orientation>;model=<model-id>,...'. Run 'gcloud firebase test android|ios models list' to see available devices. Note: This feature is in beta.",
+                                       description: "Path to file containing a list of devices to run automated tests on, in the format 'model=<model-id>,version=<os-version-id>,locale=<locale>,orientation=<orientation>;model=<model-id>,...'. Run 'gcloud firebase test android|ios models list' to see available devices. Note: This feature is in beta",
                                        optional: true,
                                        type: String),
           FastlaneCore::ConfigItem.new(key: :test_username,
@@ -538,7 +538,7 @@ def self.available_options
                                        optional: true,
                                        type: String),
           FastlaneCore::ConfigItem.new(key: :test_async,
-                                       description: "Run tests asynchronously. Visit the Firebase console for the automatic test results.",
+                                       description: "Run tests asynchronously. Visit the Firebase console for the automatic test results",
                                        optional: false,
                                        default_value: false,
                                        type: Boolean),