https://www.durham.ac.uk/departments/academic/mathematical-s...
As an example, from the section labeled "Suggestions and resources": "Consider giving short biographies of the mathematicians whose work you present in your modules. If in doing so you realise that they are almost entirely (or even completely) white and/or male, ask yourself why this is. See if you can find contributions to the field from mathematicians of other genders/ethnicities."
From some of the other comments here, maybe the original article gave the impression of coerced or repressed speech, but I don't see that in this statement. The section is labelled "Suggestions and resources". The quote above uses wording like "Consider giving", "ask yourself", "See if you can". The tone of the statement as a whole is similar.
I was a math professor for 38 years. I'm actually kind of opinionated about my teaching, and never cared for people telling me what to say or do. But there was nothing here that pushed my buttons - and in fact, some of the suggestions seemed pretty reasonable.