docs: fix spec of no borrow

Co-authored-by: MathisGD <74971347+MathisGD@users.noreply.github.com>
Signed-off-by: Quentin Garchery <QGarchery@users.noreply.github.com>

certora/specs/StayHealthy.spec

@@ -111,7 +111,7 @@ rule stayHealthyLiquidateLastBorrow(env e, MorphoHarness.MarketParams marketPara
 
     // Safe require because of the invariant sumBorrowSharesCorrect.
     require borrowShares(id, user) <= totalBorrowShares(id);
-    // Assume that there is still some borrow on the market after liquidation.
+    // Assume that there is no remaining borrow on the market after liquidation.
     require totalBorrowAssets(id) == 0;
 
     bool stillHealthy = isHealthy(marketParams, user);