Point docs GitHub links to main

[mrubens]

Summary

• update the self-hosting guide link from develop to main
• update the local-development guide link from develop to main
• update the license link from develop to main

Validation

• confirmed all three targets exist on origin/main
• confirmed no GitHub URL under apps/docs retains a /develop/ branch segment
• prettier --check on all changed MDX files
• git diff --check

[roomote-roomote]

No code issues found. See task

Docs-only change pointing three repository links from develop to main. Confirmed all three targets (LICENSE, LOCAL_DEVELOPMENT.md, SELF_HOSTING.md) exist on origin/main, and no /develop/ GitHub links remain under apps/docs.

_{Reviewed 8302136}