Bump pygments from 2.14.0 to 2.15.0

Bumps [pygments](https://github.com/pygments/pygments) from 2.14.0 to 2.15.0.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.14.0...2.15.0)

---
updated-dependencies:
- dependency-name: pygments
  dependency-type: indirect
...

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

requirements.txt

@@ -61,6 +61,8 @@ jinja2==3.1.2
     # via
     #   myst-parser
     #   sphinx
+json-merge-patch==0.2
+    # via hsds-schema-tools
 jsonpointer==2.3
     # via
     #   jsonschema
@@ -103,7 +105,7 @@ pandas==1.5.3
     # via flatterer
 picobox==2.2.0
     # via sphinxcontrib-openapi
-pygments==2.14.0
+pygments==2.15.0
     # via
     #   sphinx
     #   sphinx-mdinclude
@@ -124,6 +126,7 @@ pyyaml==6.0
 requests==2.31.0
     # via
     #   check-jsonschema
+    #   hsds-schema-tools
     #   sphinx
 rfc3339-validator==0.1.4
     # via jsonschema