Error in an example given in PoA consensus mechanism

[jinishgupta]

On the page https://ethereum.org/en/developers/docs/consensus-mechanisms/poa/#concurrent-blocks , the example is incorrect .
The initial explanation states that:
Each signer is allowed to mint 1 block out of K.
At any given time, N - K + 1 validators can mint blocks.
Problem in Example:
The example says:
10 authorized signers can create 1 block out of 20.
But it states that 11 validators can create blocks at any given time, which is inconsistent with the formula:
N−K+1
Substituting the values:
10 − 20 +1= − 9 ( which is invalid and suggests a logical error.)
So, I would like to update the example with correct data so that there is no confusion for users and developers who are trying to understand how concurrent blocks work in PoA network.