Typo in doc in Driscoll-Kraay formula

[vgreg]

I could be mistaken, but I think there is a typo in the documentation related to the Driscoll-Kraay estimator.
It should be \hat{\Gamma}_{i} instead of \hat{\Gamma}_{1}.

linearmodels/doc/source/panel/mathematical-detail.txt

Line 238 in facba92

\hat{S}_{HAC} & =\hat{\Gamma}_{0}+\sum_{i=1}^{bw}K(i,bw)(\hat{\Gamma}_{1}+\hat{\Gamma}_{1}^{\prime})\\