Remove monitoring app mention from README

[krzysztofzuraw]

Scope of the PR

I wanted to remove mention of monitoring app from README as there is no apps/monitoring folder anymore.

Related issues

Checklist

• I added changesets and read good practices.

[changeset-bot]

⚠️ No Changeset found

Latest commit: ed0e1f1

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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