fix: functions count in startup logs not counting overloaded functions

Renames the "Functions" in the logs to "RPCs". This clarifies that
we log number of callable functions and not the number of SQL objects.

Signed-off-by: Taimoor Zaeem <taimoorzaeem@gmail.com>

src/PostgREST/SchemaCache.hs

@@ -108,7 +108,7 @@ showSummary (SchemaCache tbls rels routs reps mediaHdlrs tzs _ _) =
   T.intercalate ", "
   [ show (HM.size tbls)       <> " Relations"
   , show (HM.size rels)       <> " Relationships"
-  , show (HM.size routs)      <> " Functions"
+  , show (HM.size routs)      <> " RPCs"
   , show (HM.size reps)       <> " Domain Representations"
   , show (HM.size mediaHdlrs) <> " Media Type Handlers"
   , show (S.size tzs)         <> " Timezones"