Wrong application name in `COPYING.md`

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It seems like in the COPYING.md it states that this is the Proton VPN GTK-App.

The first paragraph is correct, but the second paragraph seems to contain that error as it states

Proton VPN GTK app is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.