ruby: Run rbspy in silent mode (#129)

Author: Jongy

gprofiler/ruby.py

@@ -31,6 +31,7 @@ def _make_command(self, pid: int, output_path: str):
         return [
             resource_path(self.RESOURCE_PATH),
             "record",
+            "--silent",
             "-r",
             str(self._frequency),
             "-d",