Fix a typo in board.md

Just saw this when reading the policy

board.md

@@ -515,7 +515,7 @@ to pay attention to budgetary issues or a Recruitment Committee to consider memb
 of the community we wish to invite to join the Board.
 
 Committees are distinguished from *Task Forces*, which report to the Executive
-Director (or their designee). A Task Force is not concerned with Board goveranance
+Director (or their designee). A Task Force is not concerned with Board governance
 or oversight of the HF, but instead with enacting a plan to improve or support the
 Haskell language ecosystem. As examples, we might have a Core Libraries Task Force
 or a Community Moderation Task Force. Note that both of these have *external* deliverables