Update SD Rule Support matrix to include new rules

What does this MR do and why?

We added coverage for more new rules in the latest release version (v0.18.0) of Secret Detection Ruleset. This MR updates the Ruleset Support matrix reflecting the mentioned changes.

References

Bump secret-detection-rules to version v0.18.0 ... (#576279 - closed) • Vishwa Bhat • 18.6

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