docs: use markdown for readme file

README.md

@@ -1,6 +1,5 @@
 
-rattail-tempmon
-===============
+# rattail-tempmon
 
 Rattail is a retail software framework, released under the GNU General Public
 License.
@@ -8,6 +7,5 @@ License.
 This is the ``rattail-tempmon`` package, which provides a database schema, and
 client/server daemons for recording and processing temperature data.
 
-Please see Rattail's `home page`_ for more information.
-
-.. _home page: https://rattailproject.org/
+Please see Rattail's [home page](https://rattailproject.org/) for more
+information.

pyproject.toml

@@ -8,7 +8,7 @@ build-backend = "hatchling.build"
 name = "rattail-tempmon"
 version = "0.4.6"
 description = "Retail Software Framework - Temperature monitoring add-on"
-readme = "README.rst"
+readme = "README.md"
 authors = [{name = "Lance Edgar", email = "lance@edbob.org"}]
 license = {text = "GNU GPL v3+"}
 classifiers = [