d/control(pkg-config): remove version constraint

#9
https://salsa.debian.org/ruby-team/ruby/-/commit/0970024589fc7bc7e794482cefbf9e7a0947e78d
https://salsa.debian.org/ruby-team/ruby/-/commit/db7995a9c8b6e946eaf3b82c685a1a9e10b72504

Author: sorah

debian/control

@@ -15,7 +15,7 @@ Build-Depends: bison,
                libyaml-dev,
                netbase <!nocheck>,
                openssl <!nocheck>,
-               pkg-config (>= 1.8.0-7~),
+               pkg-config,
                procps <!nocheck>,
                ruby3.1:native <cross>,
                rubygems-integration (>= 1.6) <!nocheck>,

debian/tests/control

@@ -1,3 +1,3 @@
 Tests: run-all bundled-gems builtin-extensions rubyconfig pkg-config
-Depends: @, libffi-dev, pkg-config (>= 1.8.0-7~), build-essential
+Depends: @, libffi-dev, pkg-config, build-essential
 Restrictions: allow-stderr