fix: update semi-style for class static blocks

[mdjermanovic]

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What is the purpose of this pull request? (put an "X" next to an item)

[ ] Documentation update
[x] Bug fix (template)
[ ] New rule (template)
[ ] Changes an existing rule (template)
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Refs #15016, fixes semi-style.

What changes did you make? (Give an overview)

Fixed false positive in the semi-style rule: the last statement in a class static block should be allowed to have its semicolon on the same line when the option is "first".

/* eslint semi-style: ["error", "first"] */

if (foo) {  
    bar(); // allowed
}

class C {
    method() {
      bar(); // allowed
    }
  
    static {
      bar(); // should be allowed, too
    }
}

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