MNT fix add reference to linkcheck_ignore
@@ -597,6 +597,9 @@ linkcheck_ignore = [
"roads-and-bridges-the-unseen-labor-behind-our-digital-infrastructure.pdf#page=.*",
"https://www.researchgate.net/publication/"
"233096619_A_Dendrite_Method_for_Cluster_Analysis",
+ "https://www.researchgate.net/publication/"
+ "221114584_Random_Fourier_Approximations_"
+ "for_Skewed_Multiplicative_Histogram_Kernels",
# Broken links from testimonials
"http://www.bestofmedia.com",
"http://www.data-publica.com/",
