doc: fix broken link in COLLABORATOR_GUIDE.md
-
make -j4 test
(UNIX), orvcbuild test nosign
(Windows) passes -
documentation is changed or added -
commit message follows commit guidelines
Affected core subsystem(s)
doc
Description of change
One of the links to CONTRIBUTING.md was broke in the doc. Updated broken link to be the same as the other one in the doc that was working.