[ga-bump-release] Update Dolt version to 1.76.4 and release v1.76.4

Author: coffeegoddd

go/cmd/dolt/doltversion/version.go

@@ -15,5 +15,5 @@
 package doltversion
 
 const (
-	Version = "1.76.3"
+	Version = "1.76.4"
 )