Update Thrust CMake Guide link in README.md

[pauleonix]

Description

The README still linked to the archived Thrust repo instead of the new CCCL repo for the Thrust CMake Guide.

Replace link.

• Closes [DOC] Outdated link in README.md #1592

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

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[wence-]

Thanks @pauleonix! One minor thing, for reasons, we don't merge to main, but rather a release branch. This is currently branch-24.08. I've retargetted your PR to that base branch, but could you please rebase your (one) commit on top of branch-24.08 and force-push?

[wence-]

/ok to test

[wence-]

/merge

[wence-]

Thanks!

[harrism]

Must be a problem with the GPU on the node running the failing test, seems unrelated. Unfortunately unlike most PRs, this one isn't giving me the option to rerun failed jobs.

[wence-]

Must be a problem with the GPU on the node running the failing test, seems unrelated. Unfortunately unlike most PRs, this one isn't giving me the option to rerun failed jobs.

I was able to now, so have kicked that run off again.