fix Developerguide spotless check

Signed-off-by: Joanne Wang <[email protected]>

DEVELOPER_GUIDE.md

@@ -57,9 +57,8 @@ When launching a cluster using one of the above commands, logs are placed in `bu
 
 #### Building from the IDE
 
-Currently, the only IDE we support is IntelliJ IDEA.  It's free, it's open source, it works. The gradle tasks above can also be launched from IntelliJ's Gradle toolbar and the extra parameters can be passed in via the Launch Configurations VM arguments. 
+Currently, the only IDE we support is IntelliJ IDEA.  It's free, it's open source, it works. The gradle tasks above can also be launched from IntelliJ's Gradle toolbar and the extra parameters can be passed in via the Launch Configurations VM arguments.
 
 ### Backport
 
 - [Link to backport documentation](https://github.com/opensearch-project/opensearch-plugins/blob/main/BACKPORT.md)
-