Fix typos

src/Packagist/WebBundle/Resources/views/About/aboutComposer.html.twig

@@ -94,10 +94,10 @@
     }
 }
 </pre>
-        <p>You only have to specify one of the two dist/source keys, but specifying both makes it more flexble.</p>
+        <p>You only have to specify one of the two dist/source keys, but specifying both makes it more flexible.</p>
 
         <h2>Adding PEAR packages</h2>
-        <p>If a library does not have a composer package but offers PEAR packages, you can also add it to composer. You just need to specify it's PEAR channel and all the channels of it's dependencies:</p>
+        <p>If a library does not have a composer package but offers PEAR packages, you can also add it to composer. You just need to specify its PEAR channel and all the channels of its dependencies:</p>
 <pre>
 {
     "repositories": [