webiste: Fix SystemC Coupling section under publications

Corrected errors:

* Fixed typo: s/Couping/Coupling
* Adjusted broken link to the paper

Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Change-Id: I152d25ed96359959281a625f3479542719e450eb
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-website/+/37855
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: Jason Lowe-Power <power.jg@gmail.com>
1 file changed