Updated Readme with Recce info

[DaveFlynn]

PR checklist

• [ ] Ensure you have added or ran the appropriate tests for your PR.
• [ ] DCO signed

What type of PR is this?

Readme update

What this PR does / why we need it:

Inform users about the future of PipeRider and recommend migration to Recce

Which issue(s) this PR fixes:

N/A

Special notes for your reviewer:

N/A

Does this PR introduce a user-facing change?:

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 48.49%. Comparing base (e2fdb2c) to head (ef1e0ab).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #935 +/- ## ========================================== + Coverage 48.48% 48.49% +0.01% ========================================== Files 63 63 Lines 9083 9083 ========================================== + Hits 4404 4405 +1 + Misses 4679 4678 -1 ```

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