patch 8.2.1524: no longer get an error for string concatenation with float

Problem:    No longer get an error for string concatenation with float.
            (Tsuyoshi Cho)
Solution:   Only convert float for Vim9 script. (closes #6787)
diff --git a/src/version.c b/src/version.c
index f977e28..70fe7df 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1524,
+/**/
     1523,
 /**/
     1522,