Fix some link to override volume and update SSGI

[sebastienlagarde]

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PR Workflow for the Graphics repository:

• All PRs must be opened as draft initially
• Reviewers can be added while the PR is still in draft
• The PR can be marked as “Ready for Review” once the reviewers have confirmed that no more changes are needed
• Tests will start automatically after the PR is marked as “Ready for Review”
• Do not use [skip ci] - this can break some of our tooling
• Read the Graphics repository & Yamato FAQ.

Checklist for PR maker

• Have you added a backport label (if needed)? For example, the need-backport-* label. After you backport the PR, the label changes to backported-*.
• Have you updated the changelog? Each package has a CHANGELOG.md file.
• Have you updated or added the documentation for your PR? When you add a new feature, change a property name, or change the behavior of a feature, it's best practice to include related documentation changes in the same PR. If you do add documentation, make sure to add the relevant Graphics Docs team member as a reviewer of the PR. If you are not sure which person to add, see the Docs team contacts sheet.
• Have you added a graphic test for your PR (if needed)? When you add a new feature, or discover a bug that tests don't cover, please add a graphic test.

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Purpose of this PR

Why is this PR needed, what hard problem is it solving/fixing?

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Testing status

Manual Tests: What did you do?

• Opened test project + Run graphic tests locally
• Built a player
• Checked new UI names with UX convention
• Tested UI multi-edition + Undo/Redo + Prefab overrides + Alignment in Preset
• C# and shader warnings (supress shader cache to see them)
• Checked new resources path for the reloader (in developer mode, you have a button at end of resources that check the paths)
• Other:

Automated Tests: What did you setup? (Add a screenshot or the reference image of the test please)

Yamato: (Select your branch):
https://yamato.prd.cds.internal.unity3d.com/jobs/902-Graphics

Any test projects to go with this to help reviewers?

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Comments to reviewers

Notes for the reviewers you have assigned.

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Thank you!

[JordanL8]

Just the TODOs and reviewing the property descriptions I added

[sebastienlagarde]

@JordanL8 updated, please review, thanks

[sebastienlagarde]

Please, adress feedback when back