chore(deps): update internal dependencies to v2 (major)

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
canonicalwebteam.flask_base	==1.1.0 -> ==2.0.0
canonicalwebteam.search	==1.3.0 -> ==2.1.1

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Release Notes

canonical-web-and-design/canonicalwebteam.flask-base (canonicalwebteam.flask_base)

v2.0.0

Compare Source

Pin to Flask 2.3.3 Update dependencies: jinja2, Werkzeug, markupsafe, itsdangerous

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