Fix the page title for the mbstring polyfill

stof · web-flow · commit debea6645af0 · 2018-06-01T11:53:11.000+02:00
diff --git a/components/polyfill_mbstring.rst b/components/polyfill_mbstring.rst
@@ -3,8 +3,8 @@
     single: Mbstring
     single: Components; Polyfill
 
-The Symfony Polyfill / Intl Mbstring Component
-==============================================
+The Symfony Polyfill / Mbstring Component
+=========================================
 
     This component provides a partial, native PHP implementation for the
     ``mbstring`` PHP extension.
