Drop py3.8 from pypproject.toml (openvinotoolkit#973)

CVS-151792

Author: akuporos

pyproject.toml

@@ -2,14 +2,13 @@
 name = "openvino-genai"
 version = "2024.5.0.0"
 description = "Python bindings for https://github.com/openvinotoolkit/openvino.genai"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 readme = {file = "src/README.md", content-type="text/markdown"}
 license = {text = "OSI Approved :: Apache Software License"}
 authors = [
     { name = "OpenVINO Developers", email = "openvino@intel.com" },
 ]
 classifiers = [
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",