Fix typo in SQL profile output demo

Author: MasterDuke17

doc/Language/performance.pod6

@@ -59,12 +59,12 @@ This will write the profile data as a series of SQL statements, suitable for ope
     perl6 --profile --profile-filename=demo.sql -e 'say (^20).combinations(3).elems'
 
     # create a SQLite database
-    sqlite3 demo.sql
+    sqlite3 demo.sqlite
 
     # load the profile data
     sqlite> .read demo.sql
 
-    # the query below is equivalent to the default view of the "Routines" tab in the HTML file
+    # the query below is equivalent to the default view of the "Routines" tab in the HTML profile
     sqlite> select
        ...>   case when r.name = "" then "<anon>" else r.name end,
        ...>   r.file,