fix: fix always update configmap

[codecov[bot]]

Codecov Report

Attention: 12 lines in your changes are missing coverage. Please review.

Comparison is base (a3ec997) 76.84% compared to head (f840106) 76.82%.

Files	Patch %	Lines
controllers/apps/v2beta1/sync_emqx_config.go	33.33%	7 Missing and 5 partials :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1016 +/- ## ========================================== - Coverage 76.84% 76.82% -0.03% ========================================== Files 67 67 Lines 6153 6152 -1 ========================================== - Hits 4728 4726 -2 Misses 1199 1199 - Partials 226 227 +1 ```

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