Add GitHub error message examples

Author: RoyalIcing

lib/components_guide_web/templates/cheatsheets/error-messages.html.md

@@ -5,3 +5,13 @@
 <collected-figure image="vscode-marketplace-offline">
   When I search in Visual Studio Code’s Marketplace and it was unable to fetch any data, we get an offline error message: “Unable to search the Marketplace when offline, please check your network connection.”
 </collected-figure>
+
+## Validation
+
+<collected-figure image="github-org-name-unavailable">
+  Organization name is not available
+</collected-figure>
+
+<collected-figure image="github-change-org-name-to-blank">
+  Organization name can't be blank, Organization name is too short (minimum is 1 character), and Organization name may only contain alphanumeric characters or single hyphens, and cannot begin or end with a hyphen
+</collected-figure>