docs(authors): add Gilbert Sanchez social links

Website, Mastodon, LinkedIn, and Bluesky from links.gilbertsanchez.com
(no Twitter/X listed there). Point the Gallery link at the real profile.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: HeyItsGilbert

content/authors/gilbert-sanchez/_index.md

@@ -2,10 +2,14 @@
 title: "Gilbert Sanchez"
 tagline: "PowerShell community contributor and module author"
 gravatar_hash: "8a5f80a8824ba8c72c0295b000476718"
+website: "https://gilbertsanchez.com"
 github: "https://github.com/HeyItsGilbert"
+mastodon: "https://fosstodon.org/@HeyItsGilbert"
+linkedin: "https://www.linkedin.com/in/gilbertsanchez"
+bluesky: "https://bsky.app/profile/gilbertsanchez.com"
 ---
 
 Gilbert Sanchez is a systems engineer who spreads the love of PowerShell at scale and
 is active across the community, including episodes of The PowerShell Podcast. He writes
 PowerShell modules for work and play — find his RPG-flavored modules **RPGDice** and
-**BeneathTheCanals** on the [PowerShell Gallery](https://www.powershellgallery.com/).
+**BeneathTheCanals** on the [PowerShell Gallery](https://www.powershellgallery.com/profiles/HeyItsGilbert).