patch 8.2.1923: Vim9: "filter" command modifier doesn't work

Problem:    Vim9: "filter" command modifier doesn't work.
Solution:   Check for space on char before argument. (closes #7216,
            closes #7222)
diff --git a/src/version.c b/src/version.c
index 4e1d570..52d8683 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1923,
+/**/
     1922,
 /**/
     1921,