Update date and upgrade warnings

Update date and upgrade warnings

CHANGELOG.md

@@ -6,12 +6,14 @@
 
 ## Improvements
 
-# v1.27.1 / 2024-06-07
+# v1.27.1 / 2024-06-10
 
 This is the first release candidate of the upcoming optional release of Lotus v1.27.1
 
 ## ☢️ Upgrade Warnings ☢️
 
+There are no upgrade warnings for this release candidate.
+
 ### JSON-RPC 2.0 Specification Conformance
 
 The JSON-RPC 2.0 specification requires that a `"result"` property be present in the case of no error from an API call. This release ensures that all API calls that return a result have a `"result"` property in the response. This is a behaviour change over Lotus v1.26 and will impact any API call that only has a single error return value, where no error has occurred.