MINOR: add blobstore documentation for workerRestart (#3485)

diff --git a/docs/distcache-blobstore.md b/docs/distcache-blobstore.md
index dfce552..a5897c4 100644
--- a/docs/distcache-blobstore.md
+++ b/docs/distcache-blobstore.md
@@ -65,10 +65,11 @@
 Users can submit their topology with the following command. The command includes the 
 topology map configuration. The configuration holds two keys “key1” and “key2” with the 
 key “key1” having a local file name mapping named “blob_file” and it is not compressed.
+Workers will restart when the key1 file is updated on the supervisors.
 
 ```
 storm jar /home/y/lib/storm-starter/current/storm-starter-jar-with-dependencies.jar 
-org.apache.storm.starter.clj.word_count test_topo -c topology.blobstore.map='{"key1":{"localname":"blob_file", "uncompress":false},"key2":{}}'
+org.apache.storm.starter.clj.word_count test_topo -c topology.blobstore.map='{"key1":{"localname":"blob_file", "uncompress":false, "workerRestart":true},"key2":{}}'
 ```
 
 ### Blob Creation Process
@@ -432,7 +433,7 @@
 
 It is possible for the cached files to be updated while topologies are running.
 The update happens in an eventual consistency model, where the supervisors poll
-Nimbus every 30 seconds, and update their local copies. In the current version,
+Nimbus every supervisor.localizer.update.blob.interval.secs seconds, and update their local copies. In the current version,
 it is the user's responsibility to check whether a new file is available.
 
 To update a cached file, use the following command. Contents come from a FILE or