Update tags/uses for semantic calculator

Author: maxkrieger

websites.yaml

@@ -459,7 +459,7 @@
  license: ""
  writeup: ""
  authors: [Max Krieger]
- tags: [word2vec, pca, glove, word-embeddings]
- uses: [demo]
+ tags: [word2vec, glove, word-embeddings]
+ uses: [demo, backend-dependent]
  img: imgs/semantic-calculator.png
  date: "2018-09-29"