Fix small typo in text

Unfortunately Twitter had no edit button.

public/code-sprints/september-2019.html

@@ -55,7 +55,7 @@ <h1>PHPUnit Code Sprint in Mannheim, Germany</h1>
                             <p class="text-end small">Stephan Hochdörfer</p>
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-                            <p class="wrapped smaller">"The @phpunit codesprint was really interesting and we fixed some many bugs. This was my first #codesprint in general and I am looking forward to the next one. Still have some todos left for the next days and weeks. It was a great event =)"</p>
+                            <p class="wrapped smaller">"The @phpunit codesprint was really interesting and we fixed many bugs. This was my first #codesprint in general and I am looking forward to the next one. Still have some todos left for the next days and weeks. It was a great event =)"</p>
                             <p class="text-end small">Daniel Ruf</p>
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