(docs) Add new CPMR0076 rule for Icon URLs

This adds the new rule for flagging Icon URLs that make use of GitHub or
RawGit URLs in the nuspec file.

This rule is not currently planned for Package Validator, but is useful
to have as it will be implemented in the Chocolatey Community Validation
extension.

Author: AdmiringWorm

src/content/docs/en-us/community-repository/moderation/package-validator/rules/cpmr0076.mdx

@@ -0,0 +1,28 @@
+---
+order: 76
+xref: cpmr0076
+title: CPMR0076 - Raw GitHub Icon URL Is Used (nuspec)
+description: Information on how to remediate the Chocloatey Package Moderation Rule 0076
+ruleType: Requirement
+---
+import Callout from '@choco/components/Callout.astro'
+import Iframe from '@choco/components/Iframe.astro';
+import Xref from '@components/Xref.astro';
+import PackageValidatorRuleRequirement from '@components/docs/PackageValidatorRuleRequirement.mdx';
+import PackageValidatorNotImplemented from '@components/docs/PackageValidatorNotImplemented.mdx';
+
+<PackageValidatorRuleRequirement />
+<PackageValidatorNotImplemented />
+
+## Issue
+
+In the nuspec, the Icon URL has been specified as coming from GitHub or RawGit.
+
+## Recommended Solution
+
+Please update the Icon URL to use an Icon that is coming from a proper CDN instead of GitHub or RawGit.
+There existis CDN providers for GitHub links that can be used, like [JSDelivr](https://www.jsdelivr.com/) and [Statically](https://statically.io/).
+
+## Reasoning
+
+GitHub has expressed it being unwanted to hotlink to _raw_ files in the past as these are not static assets, and RawGit has shut down.