patch 8.0.1248: stray + in README file

Problem:    Stray + in README file.
Solution:   Remove the +.  Add a line break.
diff --git a/src/version.c b/src/version.c
index 7bf3f43..3504ff6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1248,
+/**/
     1247,
 /**/
     1246,