Improve .readthedocs.yaml config file (#382)

Author: zliang-akamai

.readthedocs.yaml

@@ -3,11 +3,14 @@
 
 version: 2
 build:
-  os: ubuntu-22.04
+  os: ubuntu-lts-latest
   tools:
-    python: "3.12"
+    python: latest
 sphinx:
   configuration: docs/conf.py
 python:
- install:
-   - requirements: docs/requirements.txt
+  install:
+    - method: pip
+      path: .
+      extra_requirements:
+        - doc

docs/requirements.txt

@@ -50,11 +50,17 @@ dev = [
     "build>=0.10.0",
     "Sphinx>=6.0.0",
     "sphinx-autobuild>=2021.3.14",
-    "sphinxcontrib-fulltoc>=1.2.0",    
+    "sphinxcontrib-fulltoc>=1.2.0",
     "build>=0.10.0",
     "twine>=4.0.2",
 ]
 
+doc = [
+    "Sphinx>=6.0.0",
+    "sphinx-autobuild>=2021.3.14",
+    "sphinxcontrib-fulltoc>=1.2.0",
+]
+
 [project.urls]
 Homepage = "https://github.com/linode/linode_api4-python"
 Documentation = "https://linode-api4.readthedocs.io/"