[Bug]: Issues Template does not have latest major Unity versions

[wallstop]

Description

We should support 6.3, 6.4, 6.5 across the github template surface

Steps to Reproduce

Open an issue

Expected Behavior

latest major versions are selectable via dropdown

Actual Behavior

They are not

Severity

Cosmetic (visual/UX issue)

Unity Version

Other

Package Version

3.5.0

Platform

• Editor
• Windows
• macOS
• Linux
• iOS
• Android
• WebGL
• Other

Regression

• Yes, this is a regression (worked in a previous version)

Additional Context

No response