patch 8.1.0925: terminal scrollback test still still flaky

Problem:    Terminal scrollback test still still flaky.
Solution:   Explicitly set the shell.  Disable ruler. (Ozaki Kiichi,
            closes #3966)
diff --git a/src/version.c b/src/version.c
index 10715ac..567e870 100644
--- a/src/version.c
+++ b/src/version.c
@@ -784,6 +784,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    925,
+/**/
     924,
 /**/
     923,