doc: releases: fix format issue in Boards & SoCs

Remove extra space character which is causing wrong format for
the bulleted list.

Signed-off-by: Jennifer Williams <[email protected]>

Author: jenmwms

doc/releases/release-notes-2.5.rst

@@ -302,7 +302,7 @@ Boards & SoC Support
 
   * Cypress CY8CKIT_062_BLE board
 
-*  Added support for these x86 boards:
+* Added support for these x86 boards:
 
   * Elkhart Lake CRB board
   * ACRN configuration on Elkhart Lake CRB board