Fix Read The Docs build settings

.readthedocs.yml

@@ -4,6 +4,11 @@
 # Required
 version: 2
 
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
+
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
   configuration: docs/conf.py
@@ -12,9 +17,8 @@ sphinx:
 formats: all
 
 python:
-   version: 3.7
-   install:
-      - method: pip
-        path: .
-        extra_requirements:
-          - docs
+  install:
+    - method: pip
+      path: .
+      extra_requirements:
+        - docs

README.rst

@@ -8,11 +8,6 @@ Treasure Data API library for Python
    :alt: Build Status on GitHub Actions
 
 
-.. image:: https://ci.appveyor.com/api/projects/status/eol91l1ag50xee9m/branch/master?svg=true
-   :target: https://ci.appveyor.com/project/treasure-data/td-client-python/branch/master
-   :alt: Build status
-
-
 .. image:: https://badge.fury.io/py/td-client.svg
    :target: http://badge.fury.io/py/td-client
    :alt: PyPI version