fix readme link

Author: barbkess

samples/features/security/permissions-posters/README.md

@@ -6,4 +6,4 @@ Useful link: http://social.technet.microsoft.com/wiki/contents/articles/11842.sq
  - [Microsoft SQL Server 2012 Permissions Poster](Permissions_Poster_SQL_Server_2012.pdf)
  - [Microsoft SQL Server 2014 Permissions Poster](Permissions_Poster_SQL_Server_2014.pdf)
  - [Microsoft SQL Server 2016 and SQLDB Permissions Poster](Permissions_Poster_SQL_Server_2016_and_SQLDB.pdf)
- - [Microsoft SQL Server 2017 and SQLDB Permissions Poster]("Microsoft SQL Server 2017 and Azure SQL Database permissions infographic.pdf")
+ - [Microsoft SQL Server 2017 and SQLDB Permissions Poster](Microsoft SQL Server 2017 and Azure SQL Database permissions infographic.pdf)