Fix build

Author: Pascal Berger

src/GitVersionCore/BuildServers/VsoAgent.cs

@@ -24,7 +24,7 @@ public override string GetCurrentBranch()
 
         public override string GenerateSetVersionMessage(string versionToUseForBuildNumber)
         {
-            return string.Format("##vso[build.updatebuildnumber]{0}", ServiceMessageEscapeHelper.EscapeValue(versionToUseForBuildNumber))
+            return string.Format("##vso[build.updatebuildnumber]{0}", ServiceMessageEscapeHelper.EscapeValue(versionToUseForBuildNumber));
         }
     }
 }