recovery.cpp: Fix typo when unmounting system

Signed-off-by: Mohammad Hasan Keramat J <ikeramat@protonmail.com>
Change-Id: I86c245c1e624bea045eac25657af02b45cd1d605
diff --git a/recovery.cpp b/recovery.cpp
index a96b9de..a2c5682 100644
--- a/recovery.cpp
+++ b/recovery.cpp
@@ -621,7 +621,7 @@
           }
         } else {
           if (umount("/mnt/system") != -1) {
-            ui->Print("Unounted /mnt/system.\n");
+            ui->Print("Unmounted /mnt/system.\n");
             mounted = false;
           }
         }