bump tornado dependency to version 6.5.7 to fix 5 CVEs (#1535) #4203

Job	Run time
test_without_debugpy (ubuntu-latest, 3.10)	2m 17s
check_release	2m 8s
Test Prereleases	2m 30s
Test Lint	58s
Test Minimum Versions	2m 50s
link_check	4m 4s
test_docs	54s
Make SDist	40s
build (windows-latest, qt6, 3.12)	4m 30s
build (ubuntu-latest, qt5, 3.10)	2m 39s
build (windows-latest, qt5, 3.10)	6m 16s
build (windows-latest, qt6, 3.13)	4m 55s
build (ubuntu-latest, qt6, 3.12)	2m 55s
build (ubuntu-latest, qt5, pypy-3.11)	3m 28s
build (ubuntu-latest, qt6, 3.11)	2m 39s
build (ubuntu-latest, qt6, 3.10)	2m 57s
build (macos-latest, qt5, pypy-3.11)	5m 10s
build (windows-latest, qt6, 3.10)	4m 10s
build (windows-latest, qt5, 3.14)	3m 49s
build (windows-latest, qt6, pypy-3.11)	5m 56s
build (ubuntu-latest, qt5, 3.14)	2m 43s
build (windows-latest, qt6, 3.11)	4m 30s
build (macos-latest, qt6, 3.10)	2m 46s
build (ubuntu-latest, qt6, 3.13)	2m 55s
build (ubuntu-latest, qt6, pypy-3.11)	3m 25s
build (macos-latest, qt6, 3.12)	2m 43s
build (macos-latest, qt6, 3.13)	3m 15s
build (macos-latest, qt6, 3.11)	3m 4s
build (windows-latest, qt5, pypy-3.11)	6m 35s
build (macos-latest, qt6, pypy-3.11)	4m 21s
build (macos-latest, qt5, 3.10)	3m 7s
build (macos-latest, qt5, 3.14)	3m 10s
Install from SDist and Test	2m 34s
coverage	12s
	1h 51m 5s

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