fix(dgw): fix RPM webapp directories installed under wrong names (#1722)

fpm installs a source directory *by name* inside the destination when
given a bare directory path. Specifying explicit target paths ensures
webapp/client and webapp/player are consistent with the DEB package.

This is identical to the commit 1cbb8b9, but targets the currently
active code path found in tlk.ps1.

Author: CBenoit

ci/tlk.ps1

@@ -890,8 +890,8 @@ class TlkRecipe
 
         if ($this.Product -eq "gateway") {
             $FpmArgs += @(
-                "$DGatewayWebClient=/usr/share/devolutions-gateway/webapp",
-                "$DGatewayWebPlayer=/usr/share/devolutions-gateway/webapp",
+                "$DGatewayWebClient=/usr/share/devolutions-gateway/webapp/client",
+                "$DGatewayWebPlayer=/usr/share/devolutions-gateway/webapp/player",
                 "$DGatewayLibXmf=/usr/lib/devolutions-gateway/libxmf.so"
             )
         }