Fix typo

php-fpm/Dockerfile-71

@@ -61,7 +61,7 @@ RUN if [ ${INSTALL_XDEBUG} = true ]; then \
     docker-php-ext-enable xdebug \
 ;fi
 
-# Copy xdebug configration for remote debugging
+# Copy xdebug configuration for remote debugging
 COPY ./xdebug.ini /usr/local/etc/php/conf.d/xdebug.ini
 
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