Adds changelog for 8.2.0 (#2971)

* Adds changelog for 8.2.0

* Cleanup

* Update CHANGELOG.md

Co-authored-by: kellyyangsong <[email protected]>

* Fixes formatting

* Fixes formatting

---------

Co-authored-by: Sruthi Keerthi Rangavajhula (from Dev Box) <[email protected]>
Co-authored-by: kellyyangsong <[email protected]>

CHANGELOG.md

@@ -1,5 +1,27 @@
 See the [releases](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/releases) for details on bug fixes and added features.
 
+8.2.0
+=====
+### Fundamentals
+- Update System.Text.Json to 8.0.5 CVE-2024-43485. See [2892](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/pull/2892).
+- Using FixedTimeEquals in NETCore targets. See [2857](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/pull/2857).
+- Updated .NET 9 to RC 2 [2898](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/pull/2898).
+- Adds ability to create token without kid [2968](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/pull/2968)
+- Enables code coverage in PRs [2946](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/pull/2946)
+- Various test improvements:
+- [#2953](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/pull/2953)
+- [#2955](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/pull/2955)
+- [#2951](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/pull/2951)
+- [#2952](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/pull/2952)
+- [#2947](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/pull/2947)
+
+### Work related to redesign of IdentityModel's token validation logic [#2711](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/issues/2711)
+- Validates Audience for SAML2TokenHandler with New Model [2863](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/pull/2863)
+- Improvements to AudienceValidation [2902](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/pull/2902)
+- Added properties to ValidationResult [2923](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/pull/2923)
+- Implements Audience and Lifetime validations in SamlSecurityTokenHandler [2925](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/pull/2925)
+- Implements Issuer validation in SamlSecurityTokenHandler [2948](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/pull/2948)
+
 8.1.2
 =====
 ### Bug fixes