Revert recommended starting template

Co-authored-by: Henrik Tjäder <[email protected]>

Author: n8tlarsen

book/en/src/by-example/starting_a_project.md

@@ -1,9 +1,9 @@
 # Starting a new project
 
-A recommendation when starting a RTIC project from scratch on an ARMv7-M or ARMv8-M-main MCU is to 
-follow RTIC's [`defmt-app-template`]. For ARMv6-M or ARMv8-M-base, check out Section 4.? of
-this book for more information on hardware and implementation differences to be aware of before
-starting with RTIC.
+A recommendation when starting a RTIC project from scratch is to 
+follow RTIC's [`defmt-app-template`].
+
+If you are targeting ARMv6-M or ARMv8-M-base architecture, check out the section [Target  Architecture](../internals/targets.md) for more information on hardware limitations to be aware of.
 
 [`defmt-app-template`]: https://github.com/rtic-rs/defmt-app-template