Bump AngleSharp version to 1.1.0 and update release notes

Updates the AngleSharp package version and revises release notes in PreMailer.Net project.

- Updates the `AngleSharp` package reference from version `1.0.7` to `1.1.0` in the `PreMailer.Net.csproj` file.
- Bumps the project version to `2.6.0` and simplifies the release notes to highlight the version bump of `AngleSharp` from `1.0.7` to `1.1.0`.
- Removes detailed contributors and change log entries from the previous version, focusing on the current update in the release notes.
- Adjusts the full changelog link to reflect the new version comparison from `v2.5.0` to `v2.6.0`.


---

For more details, open the [Copilot Workspace session](https://copilot-workspace.githubnext.com/milkshakesoftware/PreMailer.Net/pull/407?shareId=cbd06bc7-5bc5-4059-9af8-7c56c3383744).

PreMailer.Net/PreMailer.Net/PreMailer.Net.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <TargetFrameworks>netstandard2.0;net461</TargetFrameworks>
 	<LangVersion>latest</LangVersion>
-    <Version>2.5.0</Version>
+    <Version>2.6.0</Version>
     <Authors>Martin H. Normark</Authors>
     <Description>
         PreMailer.Net is a C# utility for moving CSS to inline style attributes, to gain maximum E-mail client compatibility.
@@ -17,28 +17,9 @@
     <PackageReleaseNotes>
       What's Changed
 
-      * Bump AngleSharp from 0.16.1 to 1.0.7. Only the IMarkupFormatter from AngleSharp is exposed as public api and that interface has not changed in that version jump so this should not cause any breakages for users.
-      * Dependency Bumps for the Tests and Benchmark projects.
-      * Fix race condition when running unit tests by @jasekiw in https://github.com/milkshakesoftware/PreMailer.Net/pull/374
-      * Normalize all file line endings by @jasekiw in https://github.com/milkshakesoftware/PreMailer.Net/pull/365
-      * Update benchmark project framework by @jasekiw in https://github.com/milkshakesoftware/PreMailer.Net/pull/351
-      * Use correct framework by @kasperk81 https://github.com/milkshakesoftware/PreMailer.Net/pull/334
-      * Update CI triggers to main branch  by @martinnormark https://github.com/milkshakesoftware/PreMailer.Net/pull/332
-      * Bug triage by @martinnormark https://github.com/milkshakesoftware/PreMailer.Net/pull/328
-      * More efficient selector matching of all elements by @patrikwlund https://github.com/milkshakesoftware/PreMailer.Net/pull/326
-      * Read text node instead of InnerHtml for CSS by @patrikwlund https://github.com/milkshakesoftware/PreMailer.Net/pull/325
-      * Include a benchmark that sets all MoveCssInline() flags by @patrikwlund https://github.com/milkshakesoftware/PreMailer.Net/pull/324
-      * Realistic benchmark  by @patrikwlund https://github.com/milkshakesoftware/PreMailer.Net/pull/323
-      * Decent optimizations for CssAttributeCollection by @patrikwlund https://github.com/milkshakesoftware/PreMailer.Net/pull/322
-
-
-      New Contributors
-
-      * @patrikwlund made their first contribution in https://github.com/milkshakesoftware/PreMailer.Net/pull/323
-      * @kasperk81 made their first contribution in https://github.com/milkshakesoftware/PreMailer.Net/pull/334
-      * @jasekiw made their first contribution in https://github.com/milkshakesoftware/PreMailer.Net/pull/351
+      * Bump AngleSharp from 1.0.7 to 1.1.0. Only the IMarkupFormatter from AngleSharp is exposed as public api and that interface has not changed in that version jump so this should not cause any breakages for users.
 
-      Full Changelog: https://github.com/milkshakesoftware/PreMailer.Net/compare/v2.4.0...v2.5.0
+      Full Changelog: https://github.com/milkshakesoftware/PreMailer.Net/compare/v2.5.0...v2.6.0
     </PackageReleaseNotes>
     <PackageTags>email css newsletter html</PackageTags>
     <SignAssembly>true</SignAssembly>