fix: readme separator

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: WezSieTato

README.rst

@@ -25,8 +25,8 @@ Wspierane sklepy
 * https://megasam24.pl/
 * https://leclerc-online.pl/
 
-Pracujemy nad wsparciem dla:
-------
+Pracujemy nad wsparciem dla
+---------------------------
 * https://mamyito.pl
 * https://polskikoszyk.pl/
 * https://www.carrefour.pl/