fix: switch to my rstcheck-core fork for now

Move fast and ~~break~~ fix things. Switch to my fork of rstcheck to
unblock our PR checker.

Signed-off-by: Randolph Sapp <[email protected]>

Author: StaticRocket

requirements.txt

@@ -19,7 +19,7 @@ Pygments==2.18.0
 requests==2.32.3
 rich==13.9.4
 rstcheck==6.2.4
-rstcheck-core==1.2.1
+git+https://github.com/StaticRocket/rstcheck-core.git@dev/psdk
 shellingham==1.5.4
 snowballstemmer==2.2.0
 Sphinx==8.1.3