Impact of nematicity on the relationship between antiferromagnetic fluctuations and superconductivity in <math> <msub> <mrow> <msub> <mi>FeSe</mi> <mrow> <mn>0.91</mn> </mrow> </msub> <mi mathvariant='&quot;normal&quot;'>S</mi> </mrow> <mrow> <mn>0.09</mn> </mrow> </msub> </math> u