docs: release-notes: Added GNSS release notes

Added GNSS release notes

Signed-off-by: Bjarki Arge Andreasen <[email protected]>

Author: bjarki-andreasen

doc/releases/release-notes-3.7.rst

@@ -800,6 +800,11 @@ Drivers and Sensors
 
 * GNSS
 
+  * Added GNSS device driver API test suite.
+  * Added support for the u-blox UBX protocol.
+  * Added device driver for the u-blox M10 GNSS modem (:dtcompatible:`u-blox,m10`).
+  * Added device driver for the Luatos Air530z GNSS modem (:dtcompatible:`luatos,air530z`).
+
 * GPIO
 
   * Added support for Ambiq Apollo3 series.