Set the proxy .pac file URL (deprecated)

DEPRECATED: This policy is deprecated. It is currently supported but will become obsolete in a future release. This policy is deprecated; use 'ProxySettings' (Proxy settings) instead. It doesn't work in Microsoft Edge version 91. Specifies the URL for a proxy auto-config (PAC) file. This policy is applied only if the 'ProxySettings' policy isn't specified, and if you've selected pac_script in the 'ProxyMode' (Configure proxy server settings) policy. If you've selected any other mode for configuring proxy policies, don't enable or configure this policy. If you enable this policy, specify the URL for a PAC file, which defines how the browser automatically chooses the appropriate proxy server for fetching a particular website. If you disable or don't configure this policy, no PAC file is specified. Leave this policy unconfigured if you've specified any other method for setting proxy policies. For detailed examples, see https://go.microsoft.com/fwlink/?linkid=2094936. Example value: https://internal.contoso.com/example.pac