Docs: typo and extra tab

Author: josuah

Docs/DoxygenLayout.xml

@@ -5,5 +5,6 @@
     <tab type="pages" title="Wiki"/>
     <tab type="topics" title="SDK API"/>
     <tab type="user" title="Examples" url="https://github.com/tinyvision-ai-inc/pico-ice-sdk/tree/main/examples"/>
+    <tab type="user" title="Git" url="https://github.com/tinyvision-ai-inc/pico-ice"/>
   </navindex>
 </doxygenlayout>

Docs/index.md

@@ -1,6 +1,6 @@
 [Doc](http://pico-ice.tinyvision.ai/)
 | [Hardware](https://github.com/tinyvision-ai-inc/pico-ice)
-| [Software](https://github.com/tinyvision-ai-inc/pico-ice-sdk)
+| [Firmware](https://github.com/tinyvision-ai-inc/pico-ice-sdk)
 | [Schematic](https://raw.githubusercontent.com/tinyvision-ai-inc/pico-ice/main/Board/Rev3/pico-ice.pdf)
 | [Assembly](https://htmlpreview.github.io/?https://github.com/tinyvision-ai-inc/pico-ice/blob/main/Board/Rev3/bom/ibom.html)
 | [Discord](https://discord.gg/t2CzbAYeD2)