chore(deps): update composer:latest docker digest to 6fc2ee6

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Dockerfile

@@ -5,7 +5,7 @@ LABEL org.opencontainers.image.description="php-docker-api-client app syncs you
 LABEL org.opencontainers.image.licenses=MIT
 ENV COMPOSER_ALLOW_SUPERUSER=1
 
-COPY --from=composer:latest@sha256:7384cf9fa70b710af02c9f40bec6e44472e07138efa5ab3428a058087c0d2724 /usr/bin/composer /usr/local/bin/composer
+COPY --from=composer:latest@sha256:6fc2ee6ee9a3ac9249b0cca69d29ee7f3a7c263d7e998d69d0d722c058ccd283 /usr/bin/composer /usr/local/bin/composer
 
 WORKDIR /app
 COPY --link . /app