Bump version to 2.6.0

Author: emontnemery

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name         = "python-otbr-api"
-version      = "2.5.0"
+version      = "2.6.0"
 license      = {text = "MIT"}
 description  = "API to interact with an OTBR via its REST API"
 readme       = "README.md"