Remove https://github.com/DuendeSoftware/products/releases/tag/is-8.0.0 link

Remove https://github.com/DuendeSoftware/products/releases/tag/is-8.0.0 link as it does not exist yet

Author: maartenba

astro/src/content/docs/identityserver/upgrades/v7_4-to-v8_0.md

@@ -12,9 +12,7 @@ IdentityServer v8.0 is currently a prerelease version.
 :::
 
 IdentityServer v8.0 includes support for .NET 10, SAML 2.0 Identity Provider support, conformance
-reporting, and many other fixes and enhancements. Please see our
-[release notes](https://github.com/DuendeSoftware/products/releases/tag/is-8.0.0) for complete
-details.
+reporting, and many other fixes and enhancements.
 
 ## Step 1: Update .NET Version