err2_monitor: Use underscore in trigger string

To make automated parsing easier, replace the space in the trigger
string with an underscore.

Signed-off-by: Jason M. Bills <jason.m.bills@linux.intel.com>
Change-Id: I9085d616bec858931a7c4dd8309e90213417c537
diff --git a/include/error_monitors/err2_monitor.hpp b/include/error_monitors/err2_monitor.hpp
index 5715fb1..ddc9c40 100644
--- a/include/error_monitors/err2_monitor.hpp
+++ b/include/error_monitors/err2_monitor.hpp
@@ -60,7 +60,7 @@
                         recovery = RecoveryType::warmReset;
                     }
                 }
-                startCrashdumpAndRecovery(conn, recovery, "ERR2 Timeout");
+                startCrashdumpAndRecovery(conn, recovery, "ERR2_Timeout");
             },
             "xyz.openbmc_project.Settings",
             "/xyz/openbmc_project/control/processor_error_config",