update projects index page with the 4 prto slices

Author: CameronBrooks11

_pages/projects.md

@@ -12,10 +12,14 @@ The FEAST ecosystem consists of several project repositories that provide tools,
 
 Additional project pages, hosted standalone, can be accessed via their corresponding GitHub Pages sites:
 
+- [Slice_DCMT](/Slice_DCMT/)
+- [can-nano-shield](/can-nano-shield/)
+- [can-nano-shield-fieldbus](/can-nano-shield-fieldbus/)
 - [Slice_TEMP_NANO_S2L-r1](/Slice_TEMP_NANO_S2L-r1/)
 - [Slice_TEMP_NANO_S2L-r2](/Slice_TEMP_NANO_S2L-r2/)
 - [Slice_TEMP_NUCL_S4L-r1](/Slice_TEMP_NUCL_S4L-r1/)
 - [Slice_TEMP_NUCL_L4L-r1](/Slice_TEMP_NUCL_L4L-r1/)
-- [Slice_DCMT](/Slice_DCMT/)
-- [can-nano-shield](/can-nano-shield/)
-- [can-nano-shield-fieldbus](/can-nano-shield-fieldbus/)
+- [Slice_PRTO_CONN_S2L](/Slice_PRTO_CONN_S2L/)
+- [Slice_PRTO_THT_S2L](/Slice_PRTO_THT_S2L/)
+- [Slice_PRTO_THTA_S2L](/Slice_PRTO_THTA_S2L/)
+- [Slice_PRTO_SMT_S2L](/Slice_PRTO_SMT_S2L/)