[CMake] Fix typo (search for TCL)
[CMake] Fix typo (search for TCL)

live-clones/netgen,looooo/netgen,looooo/netgen,looooo/netgen,live-clones/netgen,live-clones/netgen,live-clones/netgen,looooo/netgen,live-clones/netgen,looooo/netgen,live-clones/netgen,looooo/netgen