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)
diff --git a/src/version.c b/src/version.c
index 7de60de..bc271c8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1487,
+/**/
     1486,
 /**/
     1485,