fix(deps): update dependency flask to v3 [security]

Author: renovate[bot]

.github/actions/waffles/requirements.txt

@@ -1,5 +1,5 @@
 docopt==0.6.2
-Flask==2.3.3
+Flask==3.1.3
 markupsafe==2.1.5
 setuptools==78.1.1 # required for distutils in Python 3.12
 git+https://github.com/cds-snc/notifier-utils.git@53.2.34#egg=notifications-utils

poetry.lock

@@ -22,7 +22,7 @@ cachetools = "4.2.4"
 # Pinned dependencies
 certifi = "^2024.0.0"        # pinned for security reasons: https://github.com/cds-snc/notification-utils/security/dependabot/22
 cryptography = "^46.0.5"     # https://github.com/cds-snc/notification-utils/security/dependabot/31
-Flask = "2.3.3"
+Flask = "3.1.3"
 Flask-Redis = "0.4.0"
 itsdangerous = "2.2.0"
 Jinja2 = "^3.0.0"