Update plane/source/docs/advanced-failsafe-configuration.rst

Co-authored-by: Peter Barker <[email protected]>

plane/source/docs/advanced-failsafe-configuration.rst

@@ -267,7 +267,7 @@ AFS_OPTIONS
 In addition, the behavior of AFS can be modified by the setting of the :ref:`AFS_OPTIONS<AFS_OPTIONS>` bitmask parameter (no bits are set by default):
 
 - bit 0 (+1), if set, the aircraft will continue the mission even after data link is recovered. If not set, the aircraft will return to the mission item right before GCS failsafe occurs 
-- bit 1 (+2), if set, will force entering AUTO when GCS failsafe occurs. This is to make sure AFS is entered while Plane is flying in other autonomous modes (such as GUIDED).
+- bit 1 (+2), if set, will force entering AUTO when GCS failsafe occurs. This is to make sure AFS is entered if the Plane is flying in other autonomous modes (such as GUIDED).
 
 Example AFS failsafe mission
 ----------------------------