Fix closing issue default pattern
What does this MR do?
This MR fixes #51085 (closed) by amending the default regex pattern. In particular it allows not recognizing Suffix as a keyword work closing issues.
What are the relevant issue numbers?
Does this MR meet the acceptance criteria?
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Changelog entry added, if necessary -
Documentation created/updated -
Tests added for this feature/bug -
Conforms to the code review guidelines -
Conforms to the merge request performance guidelines -
Conforms to the style guides -
Conforms to the database guides
Edited by Samuele Kaplun