feat: update vtk-osmesa version to 9.3.1 (#756)

## Description
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request.**

## Issue linked
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request addresses.**

## Checklist
- [x] I have tested my changes locally.
- [x] I have added necessary documentation or updated existing
documentation.
- [x] I have followed the coding style guidelines of this project.
- [x] I have added appropriate tests (unit, integration, system).
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commits style](https://www.conventionalcommits.org/en/v1.0.0/#summary)
(e.g. ``feat: add optical property``)
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---------

Co-authored-by: pyansys-ci-bot <92810346+pyansys-ci-bot@users.noreply.github.com>

Author: jorgepiloto

doc/Makefile

@@ -20,7 +20,7 @@ help:
 		@echo "Removing package(s) to avoid conflicts with package(s) needed for CI/CD"; \
 		pip uninstall --yes vtk; \
 		@echo "Installing CI/CD required package(s)"; \
-		pip install --extra-index-url https://wheels.vtk.org vtk-osmesa==9.3.1; \
+		pip install --index-url https://wheels.vtk.org vtk-osmesa==9.3.1; \
 	fi
 
 # Catch-all target: route all unknown targets to Sphinx using the new
@@ -42,4 +42,4 @@ pdf:
 
 # Build HTML files and generate examples as .py files
 html: .install-ci-dep
-	@$(SPHINXBUILD) -M html "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+	@$(SPHINXBUILD) -M html "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

doc/changelog.d/756.added.md

@@ -0,0 +1 @@
+Update vtk-osmesa version to 9.3.1