[email protected]: depend on [email protected]

Closes #54912.

Signed-off-by: Mike McQuaid <[email protected]>

Formula/protobuf@3.7.rb

@@ -21,7 +21,7 @@ class ProtobufAT37 < Formula
   depends_on "autoconf" => :build
   depends_on "automake" => :build
   depends_on "libtool" => :build
-  depends_on "python" => [:build, :test]
+  depends_on "python@3.7" => [:build, :test]
 
   resource "six" do
     url "https://files.pythonhosted.org/packages/dd/bf/4138e7bfb757de47d1f4b6994648ec67a51efe58fa907c1e11e350cddfca/six-1.12.0.tar.gz"