Generating manifest with backtick in pattern

I have a struct with this annotation. Note the backtick in the pattern

```
// +kubebuilder:validation:items:Pattern=^[`a-zA-Z]+$
```

When generating the manifests I get this error `literal not terminated (at :1:3)`

Reproduce manifest generation with the shown kubebuilder Pattern annotation containing a backtick, then trace the annotation or pattern parsing that reports the unterminated literal. Done means generation succeeds and the resulting manifest preserves the intended pattern; add a regression test if the existing test layout provides one.

Written by the indexing model from the issue text.