Make links to HTML and AndroidManifest templates point to 3.1 branch

development/cpp/creating_android_modules.rst

@@ -265,7 +265,7 @@ the project folder inside the module directory and configure it:
 
 As of this writing, Godot uses minsdk 18 and target sdk 27. If this ever
 changes, it should be reflected in the manifest template:
-`AndroidManifest.xml.template <https://github.com/godotengine/godot/blob/master/platform/android/AndroidManifest.xml.template>`__
+`AndroidManifest.xml.template <https://github.com/godotengine/godot/blob/3.1/platform/android/AndroidManifest.xml.template>`__
 
 Then, add the module folder to the project:
 

tutorials/platform/customizing_html5_shell.rst

@@ -9,7 +9,7 @@ the final web presentation and behavior. The path to the custom HTML page is
 specified in the export options as ``Html/Custom Html Shell``.
 
 The default HTML page is available in the Godot Engine repository at
-`/misc/dist/html/full-size.html <https://github.com/godotengine/godot/blob/master/misc/dist/html/full-size.html>`__.
+`/misc/dist/html/full-size.html <https://github.com/godotengine/godot/blob/3.1/misc/dist/html/full-size.html>`__.
 Some simple use-cases where customizing the default page is useful include:
 
  - Loading files from a different directory
@@ -20,7 +20,7 @@ Some simple use-cases where customizing the default page is useful include:
    the file system later
  - Passing custom "command line" arguments, e.g. ``-s`` to start a MainLoop script
 
-Another sample HTML page is available at `/misc/dist/html/fixed-size.html <https://github.com/godotengine/godot/blob/master/misc/dist/html/fixed-size.html>`__.
+Another sample HTML page is available at `/misc/dist/html/fixed-size.html <https://github.com/godotengine/godot/blob/3.1/misc/dist/html/fixed-size.html>`__.
 This page uses a fixed size canvas with an output widget below. However, the
 F12 browser console should be preferred as it can display additional
 information, such as WebGL errors.