Ruby: QLTest: fix pack search path for upgrades

Author: aibaars

.github/workflows/ruby-qltest.yml

@@ -46,5 +46,5 @@ jobs:
         run: |
           echo >empty.trap
           codeql dataset import -S ql/lib/upgrades/initial/ruby.dbscheme testdb empty.trap
-          codeql dataset upgrade testdb --additional-packs ql/lib/upgrades
+          codeql dataset upgrade testdb --additional-packs ql/lib
           diff -q testdb/ruby.dbscheme ql/lib/ruby.dbscheme