drivers: bootcount: Fix typo in documentation

The bootcount documentation was using "unattended" while it probably
intending to say "unintended"

Signed-off-by: Vasileios Amoiridis <vasileios.amoiridis@cern.ch>
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
diff --git a/doc/api/bootcount.rst b/doc/api/bootcount.rst
index 9435a7e..968c679 100644
--- a/doc/api/bootcount.rst
+++ b/doc/api/bootcount.rst
@@ -49,7 +49,7 @@
    * - u8
      - upgrade_available
 
-To prevent unattended usage of ``altbootcmd``, the ``upgrade_available``
+To prevent unintended usage of ``altbootcmd``, the ``upgrade_available``
 variable is used.
 If ``upgrade_available`` is 0, ``bootcount`` is not saved.
 If ``upgrade_available`` is 1, ``bootcount`` is saved.