Fix: align project version metadata

Author: soumya-greenbone

pyproject.toml

@@ -1,7 +1,7 @@
 [project]
 authors = [{ name = "Greenbone AG", email = "info@greenbone.net" }]
 name = "pontos"
-version = "26.5.1.dev1"
+version = "26.6.1.dev1"
 description = "Common utilities and tools maintained by Greenbone AG"
 license = "GPL-3.0-or-later"
 readme = "README.md"