Checkmk Werk 10432: cmk-update-agent.exe: Fix security issue on Windows

ID: 10432 Title: cmk-update-agent.exe: Fix security issue on Windows Component: agents Level: 2 Class: Security fix Version: 1.7.0i1 Recently, a vulnerability of PyInstaller, that we use to compile the cmk-update-agent.exe executable on windows to one file, has been discovered, see <a href=https://github.com/pyinstaller/pyinstaller/security/advisories/GHSA-7f…lt;/a>. Only the windows version of the cmk-update-agent binary is affected. Unix versions and the python script are not affected. We fix this issue by updating to PyIntaller 3.6.