monitor: Change 'input' to 'actual' in trace

Change the 'input' label in a trace to 'actual' to make it more obvious
that it means the fan's actual speed.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I76686bf8b68ad7b8fb5ad994a78a50eb1a60900c
diff --git a/monitor/fan.cpp b/monitor/fan.cpp
index 94bfcf8..ed2399c 100644
--- a/monitor/fan.cpp
+++ b/monitor/fan.cpp
@@ -391,7 +391,7 @@
 
     getLogger().log(fmt::format(
         "Setting tach sensor {} functional state to {}. "
-        "[target = {}, input = {}, allowed range = ({} - {}) "
+        "[target = {}, actual = {}, allowed range = ({} - {}) "
         "owned = {}]",
         sensor.name(), sensor.functional(), sensor.getTarget(),
         sensor.getInput(), range.first, rangeMax, sensor.hasOwner()));