upgrade docker-php-extension-installer to version 2.8.2

Author: llaville

Dockerfiles/mods/Dockerfile

@@ -7,7 +7,7 @@ FROM ${VENDOR}/php-fpm:${PHP_VERSION}-base as base
 
 FROM base as builder
 
-ARG DOCKER_PHP_EXTENSION_INSTALLER=2.7.31
+ARG DOCKER_PHP_EXTENSION_INSTALLER=2.8.2
 ADD https://github.com/mlocati/docker-php-extension-installer/releases/download/${DOCKER_PHP_EXTENSION_INSTALLER}/install-php-extensions /usr/local/bin/
 RUN chmod uga+x /usr/local/bin/install-php-extensions