Update docs pins (primarily sphinx=8.2.3) to circumvent environment errors

when running the build multiple times.

Ultimate cause is still unknown, but appears to do with some interaction
between h5_lock and the pickled environment.

Upgrade sphinx>=7.4 resulted in minor changes.
We have to go back to their built-in module template and
intersphinx mapping to `qt` has to have a proper URI target.

Author: dihm

docs/source/api/index.rst

@@ -4,7 +4,6 @@ API Reference
 
 .. autosummary::
    :toctree: _autosummary
-   :template: autosummary-module.rst
    :recursive:
 
    labscript_utils

docs/source/conf.py

@@ -104,7 +104,7 @@
     'h5py': ('https://docs.h5py.org/en/stable/', None),
     'pydaqmx': ('https://pythonhosted.org/PyDAQmx/', None),
     'qt': (
-        '',
+        'https://riverbankcomputing.com/static/Docs/PyQt5/',
         'pyqt5-modified-objects.inv',
     )  # from https://github.com/MSLNZ/msl-qt/blob/master/docs/create_pyqt_objects.py
     # under MIT License

pyproject.toml

@@ -56,9 +56,9 @@ Tracker = "https://github.com/labscript-suite/labscript-utils/issues/"
 [project.optional-dependencies]
 docs = [
     "PyQt5",
-    "Sphinx==7.2.6",
-    "sphinx-rtd-theme==2.0.0",
-    "myst_parser==2.0.0",
+    "Sphinx==8.2.3",
+    "sphinx-rtd-theme==3.0.1",
+    "myst_parser==4.0.1",
 ]
 
 [project.scripts]