[fenix] For https://github.com/mozilla-mobile/fenix/issues/8428 - move about text from static_strings.xml to strings.xml and fix comment (https://github.com/mozilla-mobile/fenix/pull/10009)

Co-authored-by: Sören Hentzschel <kontakt@agenedia.com>

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

@@ -9,11 +9,6 @@
     <!-- Preference for developers -->
     <string name="preference_leakcanary" translatable="false">LeakCanary</string>
 
-    <!-- About content. The first and second parameters are the name of the application. (For example: Fenix) -->
-    <string name="about_content" translatable="false">
-        %1$s is produced by Mozilla.
-    </string>
-
     <string name="intent_extra_toolbar_color" translatable="false">android.support.customtabs.extra.TOOLBAR_COLOR</string>
     <string name="intent_extra_session" translatable="false">android.support.customtabs.extra.SESSION</string>
     <string name="intent_extra_auth" translatable="false">support.customtabs.extra.AUTH</string>

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

@@ -20,6 +20,9 @@
     <!-- No Open Tabs Message Description -->
     <string name="no_open_tabs_description">Your open tabs will be shown here.</string>
 
+    <!-- About content. The first parameter is the name of the application. (For example: Fenix) -->
+    <string name="about_content">%1$s is produced by Mozilla.</string>
+
     <!-- Private Browsing -->
     <!-- Title for private session option -->
     <string name="private_browsing_title">You’re in a private session</string>