Update pygments requirement from <2.19.0,>=2.16.1 to >=2.16.1,<2.20.0

Updates the requirements on [pygments](https://github.com/pygments/pygments) to permit the latest version.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.16.1...2.19.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -34,7 +34,7 @@ dependencies = [
     "feedgenerator>=2.1.0",
     "jinja2>=3.1.2",
     "ordered-set>=4.1.0",
-    "pygments>=2.16.1,<2.19.0",
+    "pygments>=2.16.1,<2.20.0",
     "python-dateutil>=2.8.2",
     "rich>=13.6.0",
     "unidecode>=1.3.7",
@@ -88,7 +88,7 @@ dev = [
     "furo==2023.9.10",
     "livereload>=2.6.3",
     "psutil>=5.9.6",
-    "pygments>=2.16.1,<2.19.0",
+    "pygments>=2.16.1,<2.20.0",
     "pytest>=7.4.3",
     "pytest-cov>=4.1.0",
     "pytest-sugar>=0.9.7",