Fixes embedder tutorial DecreaseEmbeddingDim() class

[ajithvcoder]

What does this PR do?

Fixes #272

Before submitting

• Was this discussed/agreed via a GitHub issue? (not for typos and docs) Yes
• Did you read the contributor guideline?
• Did you make sure your PR does only one thing, instead of bundling different changes together?
• Did you make sure to update the documentation with your changes? (if necessary) Yes
• Did you write any new necessary tests? (not for typos and docs) No
• Did you verify new and existing tests pass locally with your changes?
• Did you list all the breaking changes introduced by this pull request? No breaking changes

[review-notebook-app]

Check out this pull request on 

See visual diffs & provide feedback on Jupyter Notebooks.

---

Powered by ReviewNB