update phpunit.xml.dist

I do not know how to solve.

---

$ composer test
> phpunit
PHPUnit 8.5.2 by Sebastian Bergmann and contributors.

Runtime:       PHP 7.4.2 with Xdebug 2.9.2
Configuration: /path/to/cakephp-api-pagination/phpunit.xml.dist

  Warning - The configuration file did not pass validation!
  The following problems have been detected:

  Line 34:
  - Element 'log', attribute 'charset': The attribute 'charset' is not allowed.
  - Element 'log', attribute 'yui': The attribute 'yui' is not allowed.
  - Element 'log', attribute 'highlight': The attribute 'highlight' is not allowed.

  Test results may not be as expected.

......                                                              6 / 6 (100%)

Time: 250 ms, Memory: 12.00 MB

OK (6 tests, 6 assertions)

Generating code coverage report in Clover XML format ... done [6 ms]

Generating code coverage report in HTML format ... done [10 ms]

---

Author: mtak3

phpunit.xml.dist

@@ -31,7 +31,7 @@
     <logging>
         <log type="tap" target="build/report.tap"/>
         <log type="junit" target="build/report.junit.xml"/>
-        <log type="coverage-html" target="build/coverage" charset="UTF-8" yui="true" highlight="true"/>
+        <log type="coverage-html" target="build/coverage"/>
         <log type="coverage-text" target="build/coverage.txt"/>
         <log type="coverage-clover" target="build/logs/clover.xml"/>
     </logging>