[Fix] Correct Roc, Simurgh and Serket Gil quantity and immunities

[Xaver-DaRed]

I affirm:

• I understand that if I do not agree to the following points by completing the checkboxes my PR will be ignored.
• I understand I should leave resolving conversations to the LandSandBoat team so that reviewers won't miss what was said.
• I have read and understood the Contributing Guide and the Code of Conduct.
• I have tested my code and the things my code has changed since the last commit in the PR and will test after any later commits.

What does this pull request do?

As title sais.
Also adapts Roc to retail spawn times, adjusts its immunities an allows ir to 2hr benediction

Steps to test these changes

None

[WinterSolstice8]

Commit doesn't indicate moving the immunity but approving anyway

[zach2good]

Squashed and added note about immunities to new commit message