Update markupsafe requirement from <2.2.0 to <3.1.0

Updates the requirements on [markupsafe](https://github.com/pallets/markupsafe) to permit the latest version.
- [Release notes](https://github.com/pallets/markupsafe/releases)
- [Changelog](https://github.com/pallets/markupsafe/blob/main/CHANGES.rst)
- [Commits](pallets/markupsafe@0.9...3.0.2)

---
updated-dependencies:
- dependency-name: markupsafe
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

pyproject.toml

@@ -71,7 +71,7 @@ testing = [
     "pytest-mpl >= 0.10",
     "pytest-timeout >= 1.3.3",
     "pytest-regressions >= 1.0",
-    "MarkupSafe < 2.2.0",
+    "MarkupSafe < 3.1.0",
 ]
 docs = [
     "Sphinx >= 1.8.2",