rename Disk Mapping to SD-Card Layout

Signed-off-by: Michel-FK <michel.stempin@funkey-project.com>

docs/developers/software_reference/index.md

@@ -50,7 +50,7 @@ console-oriented controls in the form of a D-Pad, A/B/X/Y Pad,
 Menu/On/Off, Fn and Start buttons.
 
 [1]: boot_process/index.md
-[2]: disk_mapping/partition_map.md
+[2]: sd_card_layout/partition_map.md
 
 --8<--
 includes/glossary.md