add techstacksavvy as a contributor for content

[allcontributors]

Adds @techstacksavvy as a contributor for content.

This was requested by sspencerwire in this comment

[skip ci]

[github-actions]

Test results for 3cfb52e:

Number of broken URLs: 1

URL,RESULT,FILENAME
 https://azuremarketplace.microsoft.com/en-us/marketplace/apps/resf.rockylinux-aarch64,failed,guides/cloud/migration-to-new-azure-images.md

[sspencerwire]

@all-contributors check

[allcontributors]

@sspencerwire

I could not determine your intention.

Basic usage: @all-contributors please add @Someone for code, doc and infra

For other usages see the documentation