Update tap to add text.

app/src/main/res/layout/stories_landing_item_my_stories.xml

@@ -50,7 +50,7 @@
         android:layout_height="wrap_content"
         android:layout_marginStart="@dimen/stories_landing_item_text_horizontal_margin"
         android:layout_marginEnd="@dimen/stories_landing_item_text_horizontal_margin"
-        android:text="@string/StoriesLandingFragment__tap_to_add_a_story"
+        android:text="@string/StoriesLandingFragment__tap_to_add"
         android:textAppearance="@style/Signal.Text.BodyMedium"
         android:textColor="@color/signal_colorOnSurfaceVariant"
         app:layout_constraintBottom_toBottomOf="parent"

app/src/main/res/values/strings.xml

@@ -4775,7 +4775,7 @@
     <!-- Title for "My Stories" row item in Stories landing page -->
     <string name="StoriesLandingFragment__my_stories">My Stories</string>
     <!-- Subtitle for "My Stories" row item when user has not added stories -->
-    <string name="StoriesLandingFragment__tap_to_add_a_story">Tap to add a story</string>
+    <string name="StoriesLandingFragment__tap_to_add">Tap to add</string>
     <!-- Displayed when there are no stories to display -->
     <string name="StoriesLandingFragment__no_recent_updates_to_show_right_now">No recent updates to show right now.</string>
     <!-- Context menu option to hide a story -->