fix: fix typo in UDPRoute controller's watch

[pmalek]

What this PR does / why we need it:

Fixes a typo in UDPRoute controller's watch which is set to watch status updates.

Special notes for your reviewer:

This should fail a test or 2, how come this didn't 🤔 ?

PR Readiness Checklist:

Complete these before marking the PR as ready to review:

• the CHANGELOG.md release notes have been updated to reflect any significant (and particularly user-facing) changes introduced by this PR

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (df6452c) 77.9% compared to head (736d893) 77.9%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #4835     +/-   ##
=======================================
- Coverage   77.9%   77.9%   -0.1%     
=======================================
  Files        163     163             
  Lines      18537   18537             
=======================================
- Hits       14458   14441     -17     
- Misses      3271    3284     +13     
- Partials     808     812      +4     

Files	Coverage Δ
...nternal/controllers/gateway/udproute_controller.go	71.8% <50.0%> (ø)

... and 7 files with indirect coverage changes

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