chore(deps): bump flask from 3.1.2 to 3.1.3 in /gcp/website in the pip group across 1 directory

[dependabot]

Bumps the pip group with 1 update in the /gcp/website directory: flask.

Updates flask from 3.1.2 to 3.1.3

Release notes

Sourced from flask's releases.

3.1.3

This is the Flask 3.1.3 security fix release, which fixes a security issue but does not otherwise change behavior and should not result in breaking changes compared to the latest feature release.

PyPI: https://pypi.org/project/Flask/3.1.3/ Changes: https://flask.palletsprojects.com/page/changes/#version-3-1-3

• The session is marked as accessed for operations that only access the keys but not the values, such as in and len. GHSA-68rp-wp8r-4726

Changelog

Sourced from flask's changelog.

Version 3.1.3

Released 2026-02-18

• The session is marked as accessed for operations that only access the keys but not the values, such as in and len. :ghsa:68rp-wp8r-4726

Commits

• 22d9247 release version 3.1.3
• 089cb86 Merge commit from fork
• c17f379 request context tracks session access
• 27be933 start version 3.1.3
• 4e652d3 Abort if the instance folder cannot be created (#5903)
• 3d03098 Abort if the instance folder cannot be created
• 407eb76 document using gevent for async (#5900)
• ac5664d document using gevent for async
• 4f79d5b Increase required flit_core version to 3.11 (#5865)
• fe3b215 Increase required flit_core version to 3.11
• Additional commits viewable in compare view

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[dependabot]

Looks like flask is no longer updatable, so this is no longer needed.