Fix ParallelSentimentAnalyzer constructor argument (#182)

* Possible typo in readme of Lab 09

* Fix ParallelSentimentAnalyzer constructor argument

`testAnalyzeWithMultipleInputs()` is calling `ParallelSentimentAnalyzer` constructor with `Map<String, SentimentScore>`, but the constructor takes `Map<String, Integer>`.
I'm assuming the test is correctly passing a `Map<String, SentimentScore>` and the constructor is incorrect.

09-threads/lab/README.md

@@ -162,7 +162,7 @@ public enum SentimentScore {
  * @param stopWords set containing stop words
  * @param sentimentLexicon map containing the sentiment lexicon, where the key is the word and the value is the sentiment score
  */
-public ParallelSentimentAnalyzer(int workersCount, Set<String> stopWords, Map<String, Integer> sentimentLexicon) { }
+public ParallelSentimentAnalyzer(int workersCount, Set<String> stopWords, Map<String, SentimentScore> sentimentLexicon) { }
 ```
 
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