typo fixes.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@1396 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/FilePath.java

@@ -147,7 +147,7 @@ public final class FilePath {
     }
 
     /**
-     * {@link FilePath} constant that can be used if the directory is not importatn.
+     * {@link FilePath} constant that can be used if the directory is not important.
      */
     public static final FilePath RANDOM = new FilePath(new File("."));
 }