[DevCenter] Update release date for DevCenter 1.0.0 (Azure#30311)

Update release date on changelog. APIView has been approved
[@azure-rest/developer-devcenter -
apiview.dev](https://apiview.dev/Assemblies/Review/e17096012eb7466a8aab7c74742c6bff?revisionId=dcf9502b75b34a37ae47c475aa281d56&doc=False)

Author: drielenr

sdk/devcenter/developer-devcenter-rest/CHANGELOG.md

@@ -1,6 +1,6 @@
 # Release History
 
-## 1.0.0 (2024-06-10)
+## 1.0.0 (2024-07-08)
 
 This release targets Azure Dev Center 2023-04-01 General Available API, which is the same version as the previous 1.0.0-beta.3 release.