📌 Update Sphinx>=9.0 (#1050)

- Update `Sphinx>=9.0`
- Update `sphinx-toolbox>=4.2.0`

Author: shaneahmed

README.md

@@ -18,8 +18,8 @@
             <img src="https://shields.io/conda/dn/conda-forge/tiatoolbox"  alt="conda-forge downloads"/>
     </a>
   <br>
-  <a href="https://tia-toolbox.readthedocs.io/en/latest/?badge=latest">
-    <img src="https://readthedocs.org/projects/tia-toolbox/badge/?version=latest" alt="Documentation Status" />
+  <a href="https://tia-toolbox.readthedocs.io/en/stable/?badge=stable">
+    <img src="https://readthedocs.org/projects/tia-toolbox/badge/?version=stable" alt="Documentation Status" />
   </a>
   <br>
   <a href="#license">

docs/requirements.txt

@@ -3,4 +3,4 @@ myst-nb>=0.17.1
 myst-parser>=0.18.1
 sphinx-copybutton>=0.5.1
 sphinx-design>=0.3.0
-sphinx-toolbox>=3.2.0
+sphinx-toolbox>=4.2.0

requirements/requirements.txt

@@ -30,7 +30,7 @@ scipy>=1.8
 shapely>=2.0.0
 SimpleITK>=2.2.1
 simsimd>=6.5.16 # required by conda-package
-sphinx>=5.3.0, <9.0.0
+sphinx>=9.0.0
 tifffile>=2025.5.21
 timm>=1.0.3
 torch>=2.5.0