chore(deps): update dependency matplotlib to v3.9.0

docs/requirements.txt

@@ -1,7 +1,7 @@
 certifi>=2023.7.22 # not directly required, pinned by Snyk to avoid a vulnerability
 furo==2024.5.6
 jinja2>=3.1.3 # not directly required, pinned by Snyk to avoid a vulnerability
-matplotlib==3.8.4
+matplotlib==3.9.0
 pillow>=10.0.1 # not directly required, pinned by Snyk to avoid a vulnerability
 pygments==2.18.0
 requests>=2.31.0 # not directly required, pinned by Snyk to avoid a vulnerability