Update ProtonVPN Docs

[oregonpillow]

docker-transmission-openvpn/docs/provider-specific.md

Lines 130 to 133 in dad76c5

	2. in the directory with your docker-compose file, create a directory: `mkdir protonvpn`
	3. copy your ovpn file (node-<country of choice>.protonvpn.udp.ovpn) from step 1 to the protonvpn directory
	4. add the environment vars below and add +pmp to your username if you want to use port forwarding.
	5. add the [update-port.sh](https://github.com/haugene/vpn-configs-contrib/blob/main/openvpn/protonvpn/update-port.sh) script for ProtonVPN from vpn-configs-contrib to the protonvpn directory of step 2.

no longer relevant.

• The update script is already included and ran automatically, no need to copy it into container

[ilike2burnthing]

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