replace build.image with build.os in the .readthedocs.yaml config (#329)

* replace build.image with build.os in the .readthedocs.yaml config

https://docs.readthedocs.io/en/stable/config-file/v2.html

build.image (which is implicitly used if neither is specified) will be deprecated in October 2023

* update min requirements to rocm-docs-core 0.24.2

* Upgrade Doxyfile with doxygen -u

* Add current project name to conf.py

* Update doc requirements

* Fix formatting for rtd config file

* Update doxygen settings in Doxyfile and conf.py

* Update doc requirements

* Fix certifi version

* Set doxygen version 1.8.17 in RTD build via ubuntu 20

ubuntu 22 uses doxygen version 1.9.1
which is returning errors on RTD build

Author: samjwu

.readthedocs.yml

@@ -4,11 +4,15 @@
 version: 2
 
 sphinx:
-  configuration: docs/conf.py
+   configuration: docs/conf.py
 
 formats: [htmlzip]
 
 python:
-  version: 3.8
-  install:
-    - requirements: docs/.sphinx/requirements.txt
+   install:
+   - requirements: docs/.sphinx/requirements.txt
+
+build:
+   os: ubuntu-20.04
+   tools:
+      python: "3.8"