Update README.md

Author: rbrittonMitre

README.md

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+>**Note 2024-12-4 CVE REST Services was updated to use the CVE Record Format Schema 5.1.1 on Wednesday 12/4 at 4.00PM EST:** This update introduces “non breaking” changes containing new features that some CNAs may be interested in using in the future.  (see  [CVE Record Format version 5.1.1 Release notes](https://github.com/CVEProject/cve-schema/releases/tag/v5.1.1-rc2).  As a fully backwards compatible update (meaning that all previously published CVE Records will validate using this schema),  most users will see no  operational impact as a result of this change.    This schema defines the data format for CVE Records, regardless of whether they were published before or after December 4.  
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 >**Note 2024-09-17 CVE Repository Historical Record Correction:** CVE Records originally published prior to 2023 with incorrect Reserved/Published/Update dates have been corrected.  This action corrected approximately 27,000 records that had been assigned incorrect Reserved, Published or Updated dates as part of JSON 5.0 CVE Record adoption.
 
 > **Note 2024-07-31 CVE Records may now contain a new container called the *CVE Program Container***:  This new container provides additional information added by the CVE Program to include Program-added references.  Users of this repository may need to process two containers.  See below for more information.