add ShyRain as a contributor for content

[allcontributors]

Adds @ShyRain as a contributor for content.

This was requested by sspencerwire in this comment

[skip ci]

[github-actions]

Test results for 0658fbe:

Number of broken URLs: 10

URL,RESULT,FILENAME
 http://untroubled.org/bcron/,failed,guides/automation/cronie.md
 https://www.qyecst.cn,failed,guides/contribute/README.md
 https://www.linode.com/docs/guides/beginners-guide-to-lxd-reverse-proxy,failed,guides/containers/lxd_web_servers.md
 https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/9.0_release_notes/overview#overview-major-changes,failed,release_notes/9_0.md
 https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.5_release_notes/known-issues,failed,release_notes/8_5.md
 https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/9.3_release_notes/known-issues,failed,release_notes/9_3.md
 https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.7_release_notes/new-features#enhancement_dynamic-programming-languages-web-and-database-servers,failed,release_notes/8_7.md
 https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.8_release_notes/overview#overview-major-changes,failed,release_notes/8_8.md
 https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/9.2_release_notes/new-features#new-features-compilers-and-development-tools,failed,release_notes/9_2.md
 https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html-single/8.6_release_notes#enhancement_infrastructure-services,failed,release_notes/8_6.md