fix typos in kv compile errors and log documentation

[Isvane]

Description

This PR fixes minor typographical errors within the log crate:

1. Fixes spelling mistakes in several compile_error! macros under the kv feature flags, changing requites to requires.
2. Removes an unnecessary comma in the log! macro documentation block for better readability.

Type of Change

• Documentation update / Minor text fix (non-breaking change to docs and compiler error messages)

Checklist

• I have ran cargo test --features "kv kv_sval kv_serde kv_std" locally and all tests passed (including doc-tests).

[KodrAus]

Thanks @Isvane