Check the right variables (#35)

src/tool-cache.ts

@@ -21,8 +21,8 @@ const IS_WINDOWS = process.platform === 'win32'
 const userAgent = 'actions/tool-cache'
 
 // On load grab temp directory and cache directory and remove them from env (currently don't want to expose this)
-let tempDirectory: string = process.env['RUNNER_TEMPDIRECTORY'] || ''
-let cacheRoot: string = process.env['RUNNER_TOOLSDIRECTORY'] || ''
+let tempDirectory: string = process.env['RUNNER_TEMP'] || ''
+let cacheRoot: string = process.env['RUNNER_TOOL_CACHE'] || ''
 // If directories not found, place them in common temp locations
 if (!tempDirectory || !cacheRoot) {
   let baseLocation: string