minor #15220 [HttpFoundation] Fix IpUtils example (sebpacz)

This PR was merged into the 4.4 branch.

Discussion
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[HttpFoundation] Fix IpUtils example

This PR fixes a small bug in the IpUtils class name.

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Commits
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60d3a1b [HttpFoundation] Fix IpUtils example

Author: javiereguiluz

components/http_foundation.rst

@@ -331,11 +331,11 @@ analysis purposes. Use the ``anonymize()`` method from the
     use Symfony\Component\HttpFoundation\IpUtils;
 
     $ipv4 = '123.234.235.236';
-    $anonymousIpv4 = IPUtils::anonymize($ipv4);
+    $anonymousIpv4 = IpUtils::anonymize($ipv4);
     // $anonymousIpv4 = '123.234.235.0'
 
     $ipv6 = '2a01:198:603:10:396e:4789:8e99:890f';
-    $anonymousIpv6 = IPUtils::anonymize($ipv6);
+    $anonymousIpv6 = IpUtils::anonymize($ipv6);
     // $anonymousIpv6 = '2a01:198:603:10::'
 
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