Fix version information in pyproject.toml

Our release tool pontos didn't support the `project.version` field and
therefore updating the version during the release was broken. As a
result 27.0.0 didn't get released to PyPI.

Author: bjoernricks

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "python-gvm"
-version = "26.11.2.dev1"
+version = "27.0.1.dev1"
 description = "Library to communicate with remote servers over GMP or OSP"
 authors = [{ name = "Greenbone AG", email = "info@greenbone.net" }]
 requires-python = ">=3.10,<4"
@@ -36,7 +36,7 @@ dev = [
     "sphinx>=5.3.0",
     "autohooks-plugin-ruff>=25.2.0",
     "autohooks-plugin-mypy>=22.7.0",
-    "pontos>=22.7.2",
+    "pontos>=26.4.0",
     "furo>=2022.6.21",
     "lxml-stubs>=0.5.1,<0.6",
     "types-paramiko>=3.4.0.20240205,<5.0.0.0",