Documentation inconsistency in toolchain list

[andreas-h]

In the documentation, there is a list of toolchains at https://easybuild.readthedocs.org/en/latest/eb_list_toolchains.html. In the table, there is a toolchain gmpich2. However, this toolchain doesn't seem to exist in EasyBuild 2.7.0; instead there is gmpich.

If this is simply a typo in the documentation, I'm happy to submit a PR to fix that, but wanted to check first if this is really so simple.

[andreas-h]

Also, I noticed that the easyconfigs repo seems to contain an iompi toolchain, which is not mentioned in the list.