Update dependency tornado to v6.2
diff --git a/.github/workflows/mkdocs-requirements.txt b/.github/workflows/mkdocs-requirements.txt
index f871a73..91590ea 100644
--- a/.github/workflows/mkdocs-requirements.txt
+++ b/.github/workflows/mkdocs-requirements.txt
@@ -16,4 +16,4 @@
 repackage==0.7.3
 six==1.16.0
 termcolor==1.1.0
-tornado==6.1
+tornado==6.2