fixed incorrect female name

[danielchodusov]

What is the reason for this PR?

I've identified and corrected a gender mismatch for the name "Ilona". Previously, "Ilona" was mistakenly categorized under male names. I have replaced this name with Igor. To provide context:

Ilona: This name is of Hungarian origin and has been adopted by several languages, including Czech. In all contexts, "Ilona" is a strictly female name.

Igor: This is a male name of Russian origin and is commonly used across Slavic countries, including the Czech Republic.

• [ ] A new feature
• [x] Fixed an issue

Author's checklist

• [x] Follow the Contribution Guide
• [ ] New features and changes are documented

Summary of changes

Replaced name in cs_CZ provider

Review checklist

• [ ] All checks have passed
• [ ] Changes are added to the CHANGELOG.md
• [ ] Changes are approved by maintainer

[pimjansen]

Ah crap, merged this to 2.0 target that should have been 1.x.

Will cherry pick this