Add build to the .readthedocs.yaml (#394)

* fix readthedocs build

* use sphinx 1.8.6 instead of latest 8.2.6

* sync requirements with main

---------

Co-authored-by: João Jandre <joao@scclouds.com.br>
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 12e88e9..78c7c22 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -1,5 +1,10 @@
 version: 2
 
+build:
+  os: "ubuntu-22.04"
+  tools:
+    python: "3.11"
+
 python:
    install:
    - requirements: requirements.txt
diff --git a/requirements.txt b/requirements.txt
index 93120e6..031bf6d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,5 @@
-docutils<0.18
+docutils==0.20.1
+Sphinx==7.2.6
+sphinx-rtd-theme==2.0.0
+readthedocs-sphinx-ext==2.2.5
+Jinja2==3.1.3
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