fix: update read the docs configuration

- use build.{os|tools}
- use python 3.10
- don't use pins for env

.readthedocs.yaml

@@ -1,7 +1,11 @@
 version: 2
 
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.10"
+
 python:
-  version: 3.8
   install:
     - requirements: docs/rtd-requirements.txt
 

docs/rtd-requirements.txt

@@ -1,39 +1 @@
-alabaster==0.7.12
-Babel==2.9.1
-backcall==0.2.0
-certifi==2023.7.22
-charset-normalizer==2.0.6
-decorator==5.1.0
-docutils==0.17.1
-idna==3.7
-imagesize==1.2.0
-ipython==7.31.1
-jedi==0.18.0
-Jinja2==3.1.4
-MarkupSafe==2.0.1
-matplotlib-inline==0.1.3
-packaging==21.0
-parso==0.8.2
-pexpect==4.8.0
-pickleshare==0.7.5
-prompt-toolkit==3.0.20
-ptyprocess==0.7.0
-Pygments==2.15.0
-pyparsing==2.4.7
-pytz==2021.1
-pyzmq==22.3.0
-requests==2.31.0
-snowballstemmer==2.1.0
-Sphinx==4.2.0
-sphinx-autodoc-typehints==1.12.0
-sphinx-rtd-theme==1.0.0
-sphinxcontrib-applehelp==1.0.2
-sphinxcontrib-devhelp==1.0.2
-sphinxcontrib-htmlhelp==2.0.0
-sphinxcontrib-jsmath==1.0.1
-sphinxcontrib-qthelp==1.0.3
-sphinxcontrib-serializinghtml==1.1.5
-tornado==6.3.3
-traitlets==5.1.0
-urllib3==1.26.18
-wcwidth==0.2.5
+.[docs]