1.2.0 Schema "Supports" Zip installer type

[Trenly]

Brief description of your issue

The 1.2.0 schemas list Zip as an allowable installer type, despite not having NestedInstallerType or NestedInstallerFiles

Steps to reproduce

winget-cli/schemas/JSON/manifests/v1.2.0/manifest.installer.1.2.0.json

Lines 55 to 71 in e583f91

	"InstallerType": {
	"type": [ "string", "null" ],
	"enum": [
	"msix",
	"msi",
	"appx",
	"exe",
	"zip",
	"inno",
	"nullsoft",
	"wix",
	"burn",
	"pwa",
	"portable"
	],
	"description": "Enumeration of supported installer types. InstallerType is required in either root level or individual Installer level"
	},

winget-cli/schemas/JSON/manifests/v1.2.0/manifest.singleton.1.2.0.json

Lines 97 to 113 in e583f91

	"InstallerType": {
	"type": [ "string", "null" ],
	"enum": [
	"msix",
	"msi",
	"appx",
	"exe",
	"zip",
	"inno",
	"nullsoft",
	"wix",
	"burn",
	"pwa",
	"portable"
	],
	"description": "Enumeration of supported installer types. InstallerType is required in either root level or individual Installer level"
	},

Expected behavior

Zip not to be present if it isn't supported

Actual behavior

Zip is present

Proposed Solution

Remove those lines from the schema