Fixed typos at readme.md (#662)

Summary:
Please be aware that this pull request was automatically created using [gtf](https://github.com/schneiderl/gtf) - a typo fixing bot.

You should be able to merge this with no other problems.
In case the proposed changes do not make sense I would be glad to hear about it.
Pull Request resolved: https://github.com/facebookresearch/fastText/pull/662

Reviewed By: piotr-bojanowski

Differential Revision: D12959092

Pulled By: Celebio

fbshipit-source-id: dcab01ffb1bad30e17f1ce9cad27d801edf66c99

README.md

@@ -48,7 +48,7 @@ We also provide a [cheatsheet](https://fasttext.cc/docs/en/cheatsheet.html#conte
 
 ## Requirements
 
-We are continously building and testing our library, CLI and Python bindings under various docker images using [circleci](https://circleci.com/).
+We are continuously building and testing our library, CLI and Python bindings under various docker images using [circleci](https://circleci.com/).
 
 Generally, **fastText** builds on modern Mac OS and Linux distributions.
 Since it uses some C++11 features, it requires a compiler with good C++11 support.
@@ -243,8 +243,8 @@ The following arguments are optional:
   -verbose            verbosity level [2]
 
 The following arguments for the dictionary are optional:
-  -minCount           minimal number of word occurences [1]
-  -minCountLabel      minimal number of label occurences [0]
+  -minCount           minimal number of word occurrences [1]
+  -minCountLabel      minimal number of label occurrences [0]
   -wordNgrams         max length of word ngram [1]
   -bucket             number of buckets [2000000]
   -minn               min length of char ngram [0]