Merge pull request #454 from adafruit/dhalbert-patch-1

Update .readthedocs.yaml to include os

Author: dhalbert

.readthedocs.yaml

@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
+# SPDX-FileCopyrightText: 2021 Melissa LeBlanc-Williams for Adafruit Industries
 #
 # SPDX-License-Identifier: Unlicense
 
@@ -8,8 +8,12 @@
 # Required
 version: 2
 
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3"
+
 python:
-  version: "3.6"
   install:
     - requirements: docs/requirements.txt
     - requirements: requirements.txt