wrong reference to eigenvectors instead of eigenvalues

[eavelardev]

line 5709 of 2-linear-algebra-ii.ipynb
"* Non-zero singular values of $A$ = square roots of eigenvectors eigenvalues of $AA^T$ = square roots of eigenvectors eigenvalues of $A^TA$\n"

[jonkrohn]

Great catch, @eavelardev – thanks! Now fixed :)