Bump version to 26.0.0rc1

Author: StpMax

mindsdb/__about__.py

@@ -1,6 +1,6 @@
 __title__ = "MindsDB"
 __package_name__ = "mindsdb"
-__version__ = "26.0.0"
+__version__ = "26.0.0rc1"
 __description__ = "MindsDB's AI SQL Server enables developers to build AI tools that need access to real-time data to perform their tasks"
 __email__ = "jorge@mindsdb.com"
 __author__ = "MindsDB Inc"