Capitalize YAML and RST

Capitalizing these helps to distinguish
between the yaml/rst format and file extension.

Author: pkingstonxyz

docs/docsite/rst/community/development_process.rst

@@ -78,7 +78,7 @@ We build short summary changelogs for minor releases as well as for major releas
 Creating a changelog fragment
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-A basic changelog fragment is a ``.yaml`` or ``.yml`` file placed in the ``changelogs/fragments/`` directory.  Each file contains a yaml dict with keys like ``bugfixes`` or ``major_changes`` followed by a list of changelog entries of bugfixes or features.  Each changelog entry is written in the `rst <https://docutils.sourceforge.io/docs/ref/rst/restructuredtext.html>`_ format and embedded in the yaml file. This means that certain constructs need to be escaped so that they can be interpreted by rst and not by yaml (or escaped for both yaml and rst if you prefer).  Each PR **must** use a new fragment file rather than adding to an existing one, so we can trace the change back to the PR that introduced it.
+A basic changelog fragment is a ``.yaml`` or ``.yml`` file placed in the ``changelogs/fragments/`` directory.  Each file contains a YAML dict with keys like ``bugfixes`` or ``major_changes`` followed by a list of changelog entries of bugfixes or features.  Each changelog entry is written in the `RST <https://docutils.sourceforge.io/docs/ref/rst/restructuredtext.html>`_ format and embedded in the YAML file. This means that certain constructs need to be escaped so that they can be interpreted by RST and not by YAML (or escaped for both YAML and RST if you prefer).  Each PR **must** use a new fragment file rather than adding to an existing one, so we can trace the change back to the PR that introduced it.
 
 PRs which add a new module or plugin do not necessarily need a changelog fragment. See the previous section :ref:`community_changelogs`. Also see the next section :ref:`changelogs_how_to_format` for the precise format changelog fragments should have.