Resolve h11 vulnerability

Author: ArBridgeman

doc/changes/unreleased.md

@@ -5,6 +5,7 @@
 * #193: Dependency updates, notably Jinja2 (3.1.4 -> 3.1.5), luigi (-> 3.6.0)
 * #206: Dependency updates, notably cryptography(43.0.3->44.0.2), Jinja2 (3.1.5 -> 3.1.6)
   * Due to changes in cryptography's Python support (!=3.9.0 and 3.9.1), we updated our support to Python ^3.9.2.
+* #212: Dependency updates, notably h11(0.14.0->0.16.0)
 
 # Bug fixing