fix(docs): fix most sphinx warnings (#6916)

Co-authored-by: Kevin Schlosser <kdschlosser@users.noreply.github.com>
Co-authored-by: Liam <30486941+liamHowatt@users.noreply.github.com>

docs/integration/framework/arduino.rst

@@ -85,7 +85,7 @@ this debug information to the serial interface. To enable this feature
 you have to edit the ``lv_conf.h`` file and enable logging in the
 section ``log settings``:
 
-.. code:: c
+.. code-block:: c
 
    /*Log settings*/
    #define USE_LV_LOG      1   /*Enable/disable the log module*/

docs/integration/framework/platformio.rst

@@ -1,5 +1,5 @@
 ==========
-Platformio
+PlatformIO
 ==========
 
 TODO

docs/integration/framework/tasmota-berry.rst

@@ -82,7 +82,7 @@ Let's dive right into an example!
 A simple example
 ~~~~~~~~~~~~~~~~
 
-.. code:: python
+.. code-block:: python
 
    lv.start()                 # start LVGL
    scr = lv.screen_active()         # get default screen