patch 8.1.0576: indent script tests pick up installed scripts

Problem:    Indent script tests pick up installed scripts.
Solution:   Use current runtime indent scripts.
diff --git a/src/version.c b/src/version.c
index 981d918..29fdfb2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -793,6 +793,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    576,
+/**/
     575,
 /**/
     574,