add note about multiple dbs

README.md

@@ -35,6 +35,8 @@ scripts:
 2. Pick a directory to keep the SQLite database in (I picked
    `~/.local/share/mlblive`).
 3. Create the database with `sqlite3 <filename> < schema.sql`
+    * Note that if you intend to run both scripts, or run multiple instances of
+      the scripts, you'll probably want to make a database for each instance.
 4. Put the other SQL scripts in the same directory as the database.
 5. Review the scripts to see what arguments they require.
 6. Write some systemd services and timers to execute the shell scripts