Fix typo in release notes

[wmortada]

Fixes a fatal error in the Extension File Overrides extension that parses the release notes:

konadave/com.klangsoft.overrides#11

Looking at git blame this typo was added on 6 Feb 2025 so is a recent change.

[civibot]

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[demeritcowboy]

Can you rebase against 6.0? Not critical, but technically should backport.