doc: release-notes-3.7: fuel gauge notes

Add release notes for fuel gauge drivers.

(cherry picked from commit e7c8e93)

Original-Signed-off-by: Aaron Massey <aaronmassey@google.com>
GitOrigin-RevId: e7c8e93
Change-Id: I956491d64a9fa85ae788767c27a6c0f01ac578d0
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/5720752
Reviewed-by: Keith Short <keithshort@chromium.org>
Tested-by: Keith Short <keithshort@chromium.org>
Commit-Queue: Keith Short <keithshort@chromium.org>
Tested-by: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>

doc/releases/release-notes-3.7.rst

@@ -773,6 +773,10 @@ Drivers and Sensors
     configurable (see :dtcompatible:`st,stm32-ospi`).
   * Added FlexSPI support to NXP MCXN947
 
+* Fuel Gauge
+
+  * max17048: Corrected voltage units from mV to uV.
+
 * GNSS
 
 * GPIO