Fix documentation

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>

tests/scripts/generate_psa_tests.py

@@ -521,7 +521,7 @@ def exercise_key_with_algorithm(
             key_type: psa_storage.Expr, bits: int,
             alg: psa_storage.Expr
     ) -> bool:
-        """Whether to the given key with the given algorithm.
+        """Whether to exercise the given key with the given algorithm.
 
         Normally only the type and algorithm matter for compatibility, and
         this is handled in crypto_knowledge.KeyType.can_do(). This function