Update protobuf requirement from <5,>=3.19 to >=3.19,<6 (#26)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

setup.py

@@ -36,7 +36,7 @@
         url=f"https://github.com/ansys/{package_name}",
         license="MIT",
         python_requires=">=3.7",
-        install_requires=["grpcio~=1.17", "protobuf>=3.19,<5"],
+        install_requires=["grpcio~=1.17", "protobuf>=3.19,<6"],
         package_dir={"": "src"},
         packages=setuptools.find_namespace_packages("src", include=("ansys.*",)),
         package_data={