Update ruby/ql/test/query-tests/security/decompression-api/decompression_api.rb

Co-authored-by: Arthur Baars <aibaars@github.com>

Author: thiggy1342

ruby/ql/test/query-tests/security/decompression-api/decompression_api.rb

@@ -1,7 +1,8 @@
 class TestController < ActionController::Base
     # this should get picked up
     def unsafe_zlib_unzip
-        Zlib::Inflate.inflate(params[:file])
+        path = params[:file]
+        Zlib::Inflate.inflate(path)
     end
 
     # this should not get picked up