Add reference to new paper to the footer

[AviMaayan]

Please acknowledge Rummagene in your publications by citing the following reference:

Daniel J. B. Clarke, Giacomo B. Marino, Eden Z. Deng, Zhuorui Xie, John Erol Evangelista, Avi Ma'ayan. Rummagene: Mining Gene Sets from Supporting Materials of PMC Publications. bioRxiv 2023.10.03.560783

[u8sand]

Fixed in 16164c6083c4f036f64ec07dc2c728fd7a4bafff