Rows $1,2,3,4,$ and $5$ of a triangular array of integers are shown below:

The first row is $2$. Each subsequent row is formed by placing a $1$ at each end of the row, and each interior entry is the sum of the two numbers diagonally above it in the previous row. What is the units digit of the sum of the $2026$ numbers in the $2026$th row?