Resource model design update

Signed-off-by: Agata Murawska <agatamurawska@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

doc/design-resource-model.rst

@@ -621,9 +621,7 @@ in these structures:
 +---------------+----------------------------------+--------------+
 |Name           |Description                       |Type          |
 +===============+==================================+==============+
-|mem_min        |Minimum memory size allowed       |int           |
-+---------------+----------------------------------+--------------+
-|mem_max        |Maximum allowed memory size       |int           |
+|mem_size       |Allowed memory size               |int           |
 +---------------+----------------------------------+--------------+
 |cpu_count      |Allowed vCPU count                |int           |
 +---------------+----------------------------------+--------------+