FIx http_middleware priority explanation

Problem/Motivation

The priority in document for Drupal\Core\DependencyInjection\Compiler\StackedKernelPass confused me:

/**
 * Provides a compiler pass for stacked HTTP kernels.
 *
 * Builds the HTTP kernel by collecting all services tagged 'http_middleware'
 * and assembling them into a StackedKernel. The middleware with the lowest
 * priority ends up as the outermost while the highest priority middleware
 * wraps the actual HTTP kernel defined by the http_kernel.basic service.

Proposed resolution

The highest middleware should be outermost while the lowest wraps the http_kernel.basic service;