Add @octokit/plugin-request-log, to produce debug output for requests

Without this plugin, the debug setting is, effectively, meaningless as
none of the existing plugins produce log output.

The plugin writes the request options to octokit.log.debug, and response
times as *method path - status in ...ms* to octokit.log.info.

src/main.ts

@@ -4,6 +4,7 @@ import {context, getOctokit} from '@actions/github'
 import {defaults as defaultGitHubOptions} from '@actions/github/lib/utils'
 import * as glob from '@actions/glob'
 import * as io from '@actions/io'
+import {requestLog} from '@octokit/plugin-request-log'
 import {retry} from '@octokit/plugin-retry'
 import {RequestRequestOptions} from '@octokit/types'
 import {callAsyncFunction} from './async-function'
@@ -44,7 +45,7 @@ async function main(): Promise<void> {
   if (retryOpts) opts.retry = retryOpts
   if (requestOpts) opts.request = requestOpts
 
-  const github = getOctokit(token, opts, retry)
+  const github = getOctokit(token, opts, retry, requestLog)
   const script = core.getInput('script', {required: true})
 
   // Using property/value shorthand on `require` (e.g. `{require}`) causes compilation errors.