chore(deps): update dependency php/pecl-mail-mailparse to v3.1.8 (#6096)

Signed-off-by: milkmaker <milkmaker@mailcow.de>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

data/Dockerfiles/phpfpm/Dockerfile

@@ -7,7 +7,7 @@ ARG APCU_PECL_VERSION=5.1.23
 # renovate: datasource=github-tags depName=Imagick/imagick versioning=semver-coerced extractVersion=(?<version>.*)$
 ARG IMAGICK_PECL_VERSION=3.7.0
 # renovate: datasource=github-tags depName=php/pecl-mail-mailparse versioning=semver-coerced extractVersion=^v(?<version>.*)$
-ARG MAILPARSE_PECL_VERSION=3.1.6
+ARG MAILPARSE_PECL_VERSION=3.1.8
 # 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=(?<version>.*)$