[doc] Fix master docs version to 1.5-SNAPSHOT (apache#7546)

Author: leaves12138

docs/config.toml

@@ -34,11 +34,11 @@ pygmentsUseClasses = true
   # we change the version for the complete docs when forking of a release branch
   # etc.
   # The full version string as referenced in Maven (e.g. 1.2.1)
-  Version = "1.4-SNAPSHOT"
+  Version = "1.5-SNAPSHOT"
 
   # For stable releases, leave the bugfix version out (e.g. 1.2). For snapshot
   # release this should be the same as the regular version
-  VersionTitle = "1.4-SNAPSHOT"
+  VersionTitle = "1.5-SNAPSHOT"
 
   # The branch for this version of Apache Paimon
   Branch = "master"