Added release notes and version entries for 2025.26.0

Author: GitHub Actions

website/blog/2025-06-25-Release-0.md

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+---
+author: meshcloud
+title: Release 2025.26.0
+---
+
+Release period: 2025-06-18 to 2025-06-25
+
+This release includes the following issues:
+* Accessible Name Now Matches Tag Expand Button Label
+* Fix Disabled Save on GitHub Building Block Definition
+* Fix Building Block Deletion Failure
+* Improved Accessible Labels for Project List
+* Fix false unsaved changes popup for GitHub definitions
+* Self-service customization of email style
+<!--truncate-->
+
+## Ticket Details
+### Accessible Name Now Matches Tag Expand Button Label
+**Audience:** User<br>
+
+#### Description
+To support assistive technologies, like screen readers we updated
+the visual name of the "+ more" tags expand button to match the accessible name.
+This change ensures that screen readers announce the same text as what is visually displayed.
+
+### Fix Disabled Save on GitHub Building Block Definition
+**Audience:** Customer<br>
+
+#### Description
+If you change the implementation type to 'GitHub' in your building block definition while deletion mode was set to 'Purge', you face an issue where the save button becomes disabled, preventing you from saving your definition. This issue has now been fixed.
+
+### Fix Building Block Deletion Failure
+**Audience:** Partner, Operator<br>
+
+#### Description
+Previously, deleting a building block failed when a communication that
+targeted this building block had previously been created in the Communication
+Center. This is now fixed.
+
+### Improved Accessible Labels for Project List
+**Audience:** User<br>
+
+#### Description
+To support assistive technologies, like screen readers, we now use the project's name 
+as the accessible label for project links in the workspace project list, replacing the generic "project".
+
+### Fix false unsaved changes popup for GitHub definitions
+**Audience:** Customer<br>
+
+#### Description
+Fixed an issue where an "Are you sure you want to leave and discard changes?" dialog would incorrectly appear when switching tabs (e.g., from Implementation) in Building Block Definitions of type GitHub, even if no edits were made or the version was already released.
+
+### Self-service customization of email style
+**Audience:** Partner<br>
+
+#### Description
+Platform teams can now configure the appearance of automatic emails sent via meshStack. 
+This feature allows customization of sender information, logo, footer, and action buttons 
+to match branding requirements. It ensures that communications look official and recognizable.
+A live preview helps validate changes before they go live.
+