patch 9.0.1487: Content-type header for LSP channel not according to spec

Problem:    Content-type header for LSP channel not according to spec.
Solution:   Use "vscode-jsonrpc" instead of "vim-jsonrpc". (Yegappan
            Lakshmanan, closes #12295)

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1487,
 /**/
     1486,
 /**/