man: Add missing value for Standards-Version field in dsc(5)

Reported-by: Helge Kreutzmann <debian@helgefjell.de>

debian/changelog

@@ -136,6 +136,8 @@ dpkg (1.18.5) UNRELEASED; urgency=medium
       Based on a patch by Ben Finney <ben@benfinney.id.au>.
     - Remove wrong mention that deb-control(5) support comments.
     - Make explicit that deb-control(5) documents the binary control file.
+    - Add missing value for Standards-Version field in dsc(5).
+      Reported by Helge Kreutzmann <debian@helgefjell.de>.
 
   [ Updated programs translations ]
   * Dutch (Frans Spiesschaert). Closes: #822797

man/dsc.5

@@ -108,7 +108,7 @@ Multiple co-maintainers should be separated by a comma.
 .BI Homepage: " url"
 The upstream project home page \fIurl\fP.
 .TP
-.BI Standards\-Version: " (recommended)"
+.BR Standards\-Version: " \fIversion-string\fP (recommended)"
 This documents the most recent version of the distribution policy standards
 this package complies with.
 .TP