Auto merge of #20687 - kwonoj:fix-capture-wr-guard, r=KiChjang

fix(browser): do not omit unexpected keyevent

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- closes #20681

This PR intends to fix regression caused by changes I created in #20315. In code, it matches keyevent aggressively for any pattern includes `Some('3')`, ends up actual key event does not bubbles up. This PR applies correct pattern guard to pick up specific keyevent only, other events falls back to default patterns.

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- [ ] `./mach build-geckolib` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #20681 (github issue number if applicable).

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- [ ] There are tests for these changes OR
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- manually verified
1. typing `3` in input field works
2. ctrl-shift-3 create webrender capture (verified on mac os)

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