Fix phpGH-14307: Test curl_basic_024 fails with curl 8.8.0

Curl changed the behaviour, from the changelog:
  - lib: make protocol handlers store scheme name lowercase curl/curl@c294f9c

From the docs: "The returned scheme might be upper or lowercase. Do
comparisons case insensitively."

Closes phpGH-14312.

Author: nielsdos

ext/curl/tests/curl_basic_024.phpt

@@ -25,7 +25,7 @@ var_dump(0 === curl_getinfo($ch, CURLINFO_PROXY_SSL_VERIFYRESULT));
 var_dump(curl_getinfo($ch, CURLINFO_SCHEME));
 curl_close($ch);
 ?>
---EXPECT--
+--EXPECTF--
 bool(true)
 bool(true)
-string(4) "HTTP"
+string(4) "%r(HTTP|http)%r"