Eigen library repository is not found

[AliGriv]

In CMakeList, the link for downloading Eigen3 is outdated. Just wanted to let you know.

[jwhtkr]

URL https://gitlab.com/libeigen/eigen/-/archive/3.3.3/eigen-3.3.3.tar.gz
URL_HASH SHA256=fd72694390bd8e81586205717d2cf823e718f584b779a155db747d1e68481a2e

Above are the correct url and hash for updating CMakeLists.txt on the appropriate lines (45 & 46 I believe).