Fix Typo in High Memory Task Manager Config

[swapsmagic]

Description

Fixing typo in high memory task manager config.

Motivation and Context

Fixing Typo

Impact

Test Plan

unit test

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Release Notes

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== RELEASE NOTES ==

General Changes
* Fix typo in high memory task killer strategy config `experiemental.task.high-memory-task-killer-strategy` to `experimental.task.high-memory-task-killer-stragtegy`