Update dependency flask to v3

renovate[bot] · web-flow · commit 2a05b2cef3d2 · 2023-10-29T05:43:23.000Z
diff --git a/requirements.txt b/requirements.txt
@@ -1,4 +1,4 @@
-flask==2.2.3
+flask==3.0.0
 environs==9.5.0
 gunicorn==20.1.0
 marvin
