Update phpstan action

[sgiehl]

Description:

removes dependency to external action

Review

• Functional review done
• Potential edge cases thought about (behavior of the code with strange input, with strange internal state or possible interactions with other Matomo subsystems)
• Usability review done (is anything maybe unclear or think about anything that would cause people to reach out to support)
• Security review done
• Wording review done
• Code review done
• Tests were added if useful/possible
• Reviewed for breaking changes
• Developer changelog updated if needed
• Documentation added if needed
• Existing documentation updated if needed

[sanchezzzhak]

I don't see anything criminal here.
The only thing I would do is less nested conditions.

    protected function getRegexes(): array
    {
        if (!empty($this->regexList)){
            return $this->regexList;
        }

        $cacheKey     = 'DeviceDetector-' . DeviceDetector::VERSION . 'regexes-' . $this->getName();
        $cacheKey     = (string) \preg_replace('/([^a-z0-9_-]+)/i', '', $cacheKey);
        $cacheContent = $this->getCache()->fetch($cacheKey);

        if (\is_array($cacheContent)) {
            $this->regexList = $cacheContent;
        }

        if (empty($this->regexList)) {
            $parsedContent = $this->getYamlParser()->parseFile(
                $this->getRegexesDirectory() . DIRECTORY_SEPARATOR . $this->fixtureFile
            );

            if (!\is_array($parsedContent)) {
                $parsedContent = [];
            }

            $this->regexList = $parsedContent;
            $this->getCache()->save($cacheKey, $this->regexList);
        }

        return $this->regexList;
    }