fix(business partner invite): updated name pattern to allow 2 characters

[saadanzari]

Description

updated name pattern to allow 2 characters e.g. "Li".
2 characters should be allowed for First and last name, in the business partner invite form.
e.g. Li, Su, etc

https://regex101.com/r/l1gaHp/1

Why

Names with 2 letters long in the business partner invite form are not allowed
3 characters are mandatory for First and last name, in the business partner invite form

Issue

#1024

Checklist

• I have followed the contributing guidelines
• I have performed a self-review of my own code
• I have successfully tested my changes locally

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[MaximilianHauer]

is the current implementation we would also enable users to have names like "L P" and i dont assume that we want to have this.