Merge pull request #712 from bashtage/snyk-fix-2b237efeb5d3e4ef8a97b8146516fee4

[Snyk] Fix for 4 vulnerabilities

Author: bashtage

doc/requirements.txt

@@ -19,4 +19,4 @@ mistune>=3.3.0 # not directly required, pinned by Snyk to avoid a vulnerability
 nbconvert>=7.17.0 # not directly required, pinned by Snyk to avoid a vulnerability
 pillow>=12.3.0 # not directly required, pinned by Snyk to avoid a vulnerability
 soupsieve>=2.8.4 # not directly required, pinned by Snyk to avoid a vulnerability
-tornado>=6.5.3 # not directly required, pinned by Snyk to avoid a vulnerability
+tornado>=6.5.5 # not directly required, pinned by Snyk to avoid a vulnerability