docs : make modifications to all md files to make them compatible with mkdocs

all markdown files must have a single H1 heading at the top.

Signed-off-by: Damien Martin <damlobster@gmail.com>

Update CNAME

docs/SDCard_Updates.md

@@ -1,3 +1,5 @@
+# SDCard updates
+
 Many of today's popular controller boards ship with a bootloader capable of
 updating firmware via SD Card.  While this is convenient in many
 circumstances, these bootloaders typically provide no other way to update
@@ -7,8 +9,7 @@ After Klipper has been initially flashed to a controller it is possible to
 transfer new firmware to the SD Card and initiate the flashing procedure
 via ssh.
 
-Typical Upgrade Procedure
-=========================
+## Typical Upgrade Procedure
 
 The procedure for updating MCU firmware using the SD Card is similar to that
 of other methods.  Instead of using `make flash` it is necessary to run a
@@ -37,8 +38,7 @@ Supported boards can be listed with the following command:
 If you do not see your board listed it may be necessary to add a new
 board definition as [described below](#board-definitions).
 
-Advanced Usage
-==============
+## Advanced Usage
 
 The above commands assume that your MCU connects at the default baud rate
 of 250000 and the firmware is located at `~/klipper/out/klipper.bin`.  The
@@ -78,8 +78,7 @@ Note that when upgrading a MKS Robin E3 it is not necessary to manually run
 `update_mks_robin.py` and supply the resulting binary to `flash-sdcard.sh`.
 This procedure is automated during the upload process.
 
-Caveats
-=======
+## Caveats
 
 - As mentioned in the introduction, this method only works for upgrading
   firmware.  The initial flashing procedure must be done manually per the
@@ -92,8 +91,7 @@ Caveats
   Boards that use SDIO, such as the Flymaker Flyboard and MKS Robin Nano
   V1/V2, will not work.
 
-Board Definitions
-=================
+## Board Definitions
 
 Most common boards should be available, however it is possible to add a new
 board definition if necessary.  Board definitions are located in