MINOR: stats: fix minor typo in HTML page

There is a very small typo in the statistics interface: a "set" in
lowercase where allothers are uppercase "Set".
(cherry picked from commit 8c27bcaea0116247ee055c5481a63507de4fe6e4)
diff --git a/src/dumpstats.c b/src/dumpstats.c
index c8bac08..5365042 100644
--- a/src/dumpstats.c
+++ b/src/dumpstats.c
@@ -3710,7 +3710,7 @@
 			      "<option value=\"\"></option>"
 			      "<option value=\"ready\">Set state to READY</option>"
 			      "<option value=\"drain\">Set state to DRAIN</option>"
-			      "<option value=\"maint\">set state to MAINT</option>"
+			      "<option value=\"maint\">Set state to MAINT</option>"
 			      "<option value=\"dhlth\">Health: disable checks</option>"
 			      "<option value=\"ehlth\">Health: enable checks</option>"
 			      "<option value=\"hrunn\">Health: force UP</option>"