contributor guide: update instructions for making and sharing changes

- Shifting the focus to multiple changes instead of just one
- Advising to create a branch for changes
- Removing unnecessary or too verbose explanations
- Adding useful resources and examples

(From yocto-docs rev: e7e47121fd979e034f8f40a043912640a6a25a5e)

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/dev-manual/debugging.rst

@@ -879,7 +879,7 @@ The build should work without issue.
 As with all solved problems, if they originated upstream, you need to
 submit the fix for the recipe in OE-Core and upstream so that the
 problem is taken care of at its source. See the
-":doc:`../contributor-guide/submit-change`" section for more information.
+":doc:`../contributor-guide/submit-changes`" section for more information.
 
 Debugging With the GNU Project Debugger (GDB) Remotely
 ======================================================

documentation/dev-manual/start.rst

@@ -246,13 +246,13 @@ particular working environment and set of practices.
     -  The Yocto Project community encourages you to send patches to the
        project to fix bugs or add features. If you do submit patches,
        follow the project commit guidelines for writing good commit
-       messages. See the ":doc:`../contributor-guide/submit-change`"
+       messages. See the ":doc:`../contributor-guide/submit-changes`"
        section in the Yocto Project and OpenEmbedded Contributor Guide.
 
     -  Send changes to the core sooner than later as others are likely
        to run into the same issues. For some guidance on mailing lists
        to use, see the lists in the
-       ":ref:`contributor-guide/submit-change:finding a suitable mailing list`"
+       ":ref:`contributor-guide/submit-changes:finding a suitable mailing list`"
        section. For a description
        of the available mailing lists, see the ":ref:`resources-mailinglist`" section in
        the Yocto Project Reference Manual.

documentation/dev-manual/vulnerabilities.rst

@@ -22,7 +22,7 @@ issues may be impacting Poky and OE-Core. It is up to the maintainers, users,
 contributors and anyone interested in the issues to investigate and possibly fix them by
 updating software components to newer versions or by applying patches to address them.
 It is recommended to work with Poky and OE-Core upstream maintainers and submit
-patches to fix them, see ":doc:`../contributor-guide/submit-change`" for details.
+patches to fix them, see ":doc:`../contributor-guide/submit-changes`" for details.
 
 Vulnerability check at build time
 =================================