fix: Event Dashboard

[Raunaksingh100]

Short description of what this resolves:

in this pr i fixed the points given below--

1. Delete row "number of revisions"
2. Change "External Event URL" to "Event Site"

Fixes #5131

Checklist

• I have read the Contribution & Best practices Guide.
• My branch is up-to-date with the Upstream development branch.
• The acceptance, integration, unit tests and linter pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

@iamareebjamal plz review

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[iamareebjamal]

Send this in #5139