Update some requirements

Author: Cito

.github/workflows/test.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install "tox>=4.30,<5" "tox-gh-actions>=3.5,<4"
+          pip install "tox>=4.55,<5" "tox-gh-actions>=3.5,<4"
 
       - name: Run unit tests with tox
         run: tox

.readthedocs.yaml

@@ -5,9 +5,9 @@
 version: 2
 
 build:
-  os: ubuntu-20.04
+  os: ubuntu-24.04
   tools:
-    python: "3.9"
+    python: "3.12"
 
 sphinx:
    configuration: docs/conf.py

docs/requirements.txt

@@ -1,2 +1,2 @@
-sphinx>=7,<8
-sphinx_rtd_theme>=2,<3
+sphinx>=9.1,<10
+sphinx_rtd_theme>=3.1,<4