patch 8.1.0507: .raml files not properly detected

Problem:    .raml files not properly detected.
Solution:   Recognize .raml as raml instead of yaml. (closes #3594)
diff --git a/src/version.c b/src/version.c
index 54b9a6c..28f39d4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -793,6 +793,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    507,
+/**/
     506,
 /**/
     505,