[Telink] Update config description and zephyr revision

- update OPENTHREAD_CSMABACKOFF_OPTIMIZATION description
- update zephyr revision

Signed-off-by: Damien Ji <yinghao.ji@telink-semi.com>

Author: damien0x0023

.github/workflows/chef.yaml

@@ -111,7 +111,7 @@ jobs:
                 platform: telink
             - name: Update Zephyr to specific revision (for developers purpose)
               shell: bash
-              run: scripts/run_in_build_env.sh "python3 scripts/tools/telink/update_zephyr.py b8320f9853c629f627389ed87eb16149d1e05a5c"
+              run: scripts/run_in_build_env.sh "python3 scripts/tools/telink/update_zephyr.py e8f404c8dd3ddca76e862fbfd395f2b38fabc8b5"
             - name: CI Examples Telink
               shell: bash
               run: |

.github/workflows/examples-telink.yaml

@@ -58,7 +58,7 @@ jobs:
                 gh-context: ${{ toJson(github) }}
 
             - name: Update Zephyr to specific revision (for developers purpose)
-              run: scripts/run_in_build_env.sh "python3 scripts/tools/telink/update_zephyr.py b8320f9853c629f627389ed87eb16149d1e05a5c"
+              run: scripts/run_in_build_env.sh "python3 scripts/tools/telink/update_zephyr.py e8f404c8dd3ddca76e862fbfd395f2b38fabc8b5"
 
             - name: Build example Telink (B92 retention) Air Quality Sensor App
               # Run test for master and s07641069 PRs

config/telink/chip-module/Kconfig.defaults

@@ -304,11 +304,11 @@ config CHIP_ENABLE_ICD_SUPPORT
     default y if CHIP_THREAD_DEVICE_ROLE_SLEEPY_END_DEVICE
 
 config OPENTHREAD_CSMABACKOFF_OPTIMIZATION
-	bool "Skip the first backoff during sending data request"
+	bool "Skip initial CSMA-CA backoff when sending data requests"
 	depends on CHIP_ENABLE_ICD_SUPPORT
 	default n
 	help
-	  Help save idle time during IEEE 802.15.4 communication
+	  Skip the first CSMA backoff period when sending data requests over IEEE 802.15.4.
 
 config IEEE802154_TLX_OPTIMIZATION
 	bool "Optimize 802.15.4 RF performance for TLX SoCs"