Fix variable name typo in similarity_distance function

[IGWPark]

First off, thanks for building and sharing Synalinks! :)

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Fixes incorrect variable assignment in similarity_distance function that causes all candidate distances to evaluate to ~0, breaking OMEGA's DNS mechanism.

Variable name typo at line 142:

Before:

embeddings1 = np.mean(embeddings1, axis=0) # Line 141
embeddings1 = np.mean(embeddings2, axis=0) # Line 142

After:

embeddings1 = np.mean(embeddings1, axis=0) # Line 141
embeddings2 = np.mean(embeddings2, axis=0) # Line 142

One-character fix to assign to the correct variable!

[YoanSallami]

Thanks, I didn't catch it!

[YoanSallami]

Don't hesitate to star the project, that helps a lot :) thank you again !