[w3c/payment-request] Update index.html to remove obsolete text (PR #1065)

Removed outdated information regarding the Candidate Recommendation Snapshot. The right text is automatically generated by respec:
```
Publication as a Candidate Recommendation does not imply endorsement by W3C and its Members. A Candidate Recommendation Draft integrates changes from the previous Candidate Recommendation that the Working Group intends to include in a subsequent Candidate Recommendation Snapshot.
```

See https://www.w3.org/TR/payment-request/


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<a href="https://pr-preview.s3.amazonaws.com/w3c/payment-request/pull/1065.html" title="Last updated on Mar 27, 2026, 7:34 AM UTC (8c40f9a)">Preview</a> | <a href="https://pr-preview.s3.amazonaws.com/w3c/payment-request/1065/0e99859...8c40f9a.html" title="Last updated on Mar 27, 2026, 7:34 AM UTC (8c40f9a)">Diff</a>
You can view, comment on, or merge this pull request online at:

  https://github.com/w3c/payment-request/pull/1065?email_source=notifications&email_token=AEHSJBSSWT646FH4KN2VABD4SYVLBA5CNFSNUABEM5UWIORPF5TWS5BNNB2WEL2QOVWGYUTFOF2WK43UF4ZTINJVGU3TGOBVGGTHEZLBONXW5KTTOVRHGY3SNFRGKZFFMV3GK3TUVVYHEX3POBSW4X3DNRUWG2Y

-- Commit Summary --

  * Update index.html to remove obsolete text

-- File Changes --

    M index.html (6)

-- Patch Links --

https://github.com/w3c/payment-request/pull/1065.patch?email_source=notifications&email_token=AEHSJBTFGJZCZDVHNF767LD4SYVLBA5CNFSNUABEM5UWIORPF5TWS5BNNB2WEL2QOVWGYUTFOF2WK43UF4ZTINJVGU3TGOBVGGTHEZLBONXW5KTTOVRHGY3SNFRGKZFFMV3GK3TUVZYHEX3QMF2GG2C7MNWGSY3Lhttps://github.com/w3c/payment-request/pull/1065.diff?email_source=notifications&email_token=AEHSJBVYM42GX5W2N5ZI7DD4SYVLBA5CNFSNUABEM5UWIORPF5TWS5BNNB2WEL2QOVWGYUTFOF2WK43UF4ZTINJVGU3TGOBVGGTHEZLBONXW5KTTOVRHGY3SNFRGKZFFMV3GK3TUVVYHEX3ENFTGMX3DNRUWG2Y
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