conf change: s/feedFwdOffOffsetCoeff/feedFwdOffsetCoeff/g

Fixup spelling mistake for configuration field name.

Change-Id: I92d0af06f4e15f4408dd10f0dd9cd71099b77f4f
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/test/pid_json_unittest.cpp b/test/pid_json_unittest.cpp
index f0effbd..42402d1 100644
--- a/test/pid_json_unittest.cpp
+++ b/test/pid_json_unittest.cpp
@@ -45,7 +45,7 @@
               "samplePeriod": 0.1,
               "proportionalCoeff": 0.0,
               "integralCoeff": 0.0,
-              "feedFwdOffOffsetCoeff": 0.0,
+              "feedFwdOffsetCoeff": 0.0,
               "feedFwdGainCoeff": 0.010,
               "integralLimit_min": 0.0,
               "integralLimit_max": 0.0,