Update platformio/nordicnrf52 to v10.12.0 (#10794)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

variants/nrf52840/nrf52.ini

@@ -2,7 +2,7 @@
 ; Instead of the standard nordicnrf52 platform, we use our fork which has our added variant files
 platform =
   # renovate: datasource=custom.pio depName=platformio/nordicnrf52 packageName=platformio/platform/nordicnrf52
-  platformio/nordicnrf52@10.11.0
+  platformio/nordicnrf52@10.12.0
 extends = arduino_base
 platform_packages =
   ; our custom Git version with C++17 support in platform.txt