text: Title: import gensim error. Uses triu function from scipy.linalg which is deprecated
  Body: <!--
  **IMPORTANT**:
  
  - Use the [Gensim mailing list](https://groups.google.com/g/gensim) to ask general or usage questions. Github issues are only for bug reports.
  - Check [Recipes&FAQ](https://github.com/RaRe-Technologies/gensim/wiki/Recipes-&-FAQ) first for common answers.
  
  Github bug reports that do not include relevant information and context will be closed without an answer. Thanks!
  -->
  
  #### Problem description
  
  When importing gensim there is a inner dependency error with triu function of scipy.linalg as its deprecated.
  