Update dependency phpredis/phpredis to v6

Signed-off-by: milkmaker <milkmaker@mailcow.de>

data/Dockerfiles/phpfpm/Dockerfile

@@ -10,7 +10,7 @@ ARG MAILPARSE_PECL_VERSION=3.1.4
 # renovate: datasource=github-tags depName=php-memcached-dev/php-memcached versioning=semver-coerced extractVersion=^v(?<version>.*)$
 ARG MEMCACHED_PECL_VERSION=3.2.0
 # renovate: datasource=github-tags depName=phpredis/phpredis versioning=semver-coerced extractVersion=^v(?<version>.*)$
-ARG REDIS_PECL_VERSION=5.3.7
+ARG REDIS_PECL_VERSION=6.0.1
 # renovate: datasource=github-tags depName=composer/composer versioning=semver-coerced extractVersion=^v(?<version>.*)$
 ARG COMPOSER_VERSION=2.5.5