Update android.md

[manugildev]

Branch 23LTS does not exist

[VeryHappyYoung]

Thank you for bringing this up.

As we discussed in the slack It might be better to update some information together.

Something like below,

• For Unity versions from 2019LTS to 2021LTS, use 19LTS-21LTS branch.
• For Unity versions 2022LTS, use 22LTS branch.

Thank you so much!