proton-vpn: move icon to spec-compliant location (#519474)

pkgs/by-name/pr/proton-vpn/linux.nix

@@ -62,12 +62,12 @@ python3Packages.buildPythonApplication (finalAttrs: {
   '';
 
   postInstall = ''
-    mkdir -p $out/share/{applications,pixmaps}
+    mkdir -p $out/share/applications
 
     # Fix the desktop file to correctly identify the wrapped app and show the icon during runtime
     substitute ${finalAttrs.src}/rpmbuild/SOURCES/proton.vpn.app.gtk.desktop $out/share/applications/proton.vpn.app.gtk.desktop \
       --replace-fail "StartupWMClass=protonvpn-app" "StartupWMClass=.protonvpn-app-wrapped"
-    install -Dm 644 ${finalAttrs.src}/rpmbuild/SOURCES/proton-vpn-logo.svg $out/share/pixmaps
+    install -Dm444 ${finalAttrs.src}/rpmbuild/SOURCES/proton-vpn-logo.svg -t $out/share/icons/hicolor/scalable/apps
   '';
 
   preCheck = ''