fix(ci/dependabot): invalid overlapping ecosystem configs

[gregfurman]

Description

Dependabot does not support multiple ecosystems being configured with overlapping directories. Instead, this PR reverts back to the original approach but changes version updates to weekly.

Update configs must have a unique combination of 'package-ecosystem', 'directory', and 'target-branch'. Ecosystem 'gomod' has overlapping directories.
Update configs must have a unique combination of 'package-ecosystem', 'directory', and 'target-branch'. Ecosystem 'pip' has overlapping directories.
Update configs must have a unique combination of 'package-ecosystem', 'directory', and 'target-branch'. Ecosystem 'npm' has overlapping directories.
Update configs must have a unique combination of 'package-ecosystem', 'directory', and 'target-branch'. Ecosystem 'bundler' has overlapping directories.

Type of change

• CI (any automation pipeline changes)

What's Changed

• Reverts security updates ecosystem configurations in favour of just version updates

[vercel]

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