docs: Fix README.md (#301)

README.md

@@ -266,7 +266,7 @@ job = DefaultJob(conf=job_config,
 								 task=DefaultTask(extractor=MysqlMetadataExtractor(), loader=FsNeo4jCSVLoader()),
 								 publisher=Neo4jCsvPublisher())
 job.launch()
-
+```
 
 #### [Db2MetadataExtractor](https://github.com/lyft/amundsendatabuilder/blob/master/databuilder/extractor/db2_metadata_extractor.py "Db2MetadataExtractor")
 An extractor that extracts table and column metadata including database, schema, table name, table description, column name and column description from a Unix, Windows or Linux Db2 database or BigSQL.