Fix incorrect usage of backticks in various pages

tutorials/ui/bbcode_in_richtextlabel.rst

@@ -836,7 +836,7 @@ object, which holds a few variables to control how the associated glyph is rende
   effect. You can use :ref:`get() <class_Dictionary_method_get>` with an optional default value
   to retrieve each parameter, if specified by the user. For example ``[custom_fx spread=0.5
   color=#FFFF00]test[/custom_fx]`` would have a float ``spread`` and Color ``color``
-  parameters in its ` `env`` Dictionary. See below for more usage examples.
+  parameters in its ``env`` Dictionary. See below for more usage examples.
 
 The last thing to note about this function is that it is necessary to return a boolean
 ``true`` value to verify that the effect processed correctly. This way, if there's a problem

tutorials/ui/gui_using_fonts.rst

@@ -860,7 +860,7 @@ how the default font should be rendered:
   :ref:`subpixel positioning <doc_using_fonts_subpixel_positioning>`
   method for the default project font.
 - **Default Font Multichannel Signed Distance Field:** If ``true``, makes the
-  default project font use `MSDF font rendering <doc_using_fonts_msdf>` instead
+  default project font use :ref:`MSDF font rendering <doc_using_fonts_msdf>` instead
   of traditional rasterization.
 - **Default Font Generate Mipmaps:** If ``true``, enables
   :ref:`mipmap <doc_using_fonts_mipmaps>` generation and