Merge pull request #572 from beeware/dependabot/pip/urllib3-1.26.19

Bump urllib3 from 1.26.18 to 1.26.19

Author: freakboy3742

requirements.txt

@@ -18,6 +18,6 @@ mistune==0.8.4
 python-slugify==6.1.1
 requests==2.32.0
 text-unidecode==1.3
-urllib3==1.26.18
+urllib3==1.26.19
 watchdog==2.1.7
 Werkzeug==2.3.8