ruby: update TaintStep.ql test output

Author: alexrford

ruby/ql/test/library-tests/dataflow/local/TaintStep.expected

@@ -2814,6 +2814,7 @@
 | file://:0:0:0:0 | parameter position 0 of File.realdirpath | file://:0:0:0:0 | [summary] to write: return (return) in File.realdirpath |
 | file://:0:0:0:0 | parameter position 0 of File.realpath | file://:0:0:0:0 | [summary] to write: return (return) in File.realpath |
 | file://:0:0:0:0 | parameter position 0 of Hash[] | file://:0:0:0:0 | [summary] read: argument position 0.any element in Hash[] |
+| file://:0:0:0:0 | parameter position 0 of PG.new() | file://:0:0:0:0 | [summary] to write: return (return) in PG.new() |
 | file://:0:0:0:0 | parameter position 0 of String.try_convert | file://:0:0:0:0 | [summary] to write: return (return) in String.try_convert |
 | file://:0:0:0:0 | parameter position 0 of \| | file://:0:0:0:0 | [summary] read: argument position 0.any element in \| |
 | file://:0:0:0:0 | parameter position 1.. of File.join | file://:0:0:0:0 | [summary] to write: return (return) in File.join |