gbmcweb-google-plugins gbmc-release-26.40.x: SRCREV bump bef3e3ef2a..cbf60fa75d

Guangzong Chen (1):
      build: Upgrade to C++23 for sdbusplus compatibility

Platforms-Affected: TTF
Fusion-Link:
platform5: https://fusion2.corp.google.com/02e83f9d-481e-367d-9cb9-17011f51ca48
platform15: https://fusion2.corp.google.com/83103975-e6e4-3228-858e-7df4e93cc8c3
platform18: https://fusion2.corp.google.com/04e16810-b70a-3314-b5aa-33305c3e4978
platform17: https://fusion2.corp.google.com/2d70f4b1-2564-3985-8342-710232ee0b4f
platform11+ext: https://fusion2.corp.google.com/6d3773c3-6b15-3ea8-ba63-06885e85debf
platform11: https://fusion2.corp.google.com/310a96ef-0a75-32d1-b9fa-88ff23722621
platform25: https://fusion2.corp.google.com/f30c2164-bd02-37a9-8098-d8da4b2b081c
Tested: N/A
Google-Bug-Id: 562473253
Change-Id: I14d65b6d8d7c728052082ce1d30037e5c246d679
Signed-off-by: Alex Lai <alexlai@google.com>
(cherry picked from commit 989150f5d9874600a39c6a9253c1f0da65646698)