patch 8.2.4708: PHP test files are not recognized

Problem:    PHP test files are not recognized.
Solution:   Add the *.phpt pattern. (Julien Voisin, closes #10112)
diff --git a/src/version.c b/src/version.c
index bd63e93..a7bfece 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4708,
+/**/
     4707,
 /**/
     4706,