change branch name (#17267)

Why I did it
Upgrade xgs SAI to 10.1 version.

Work item tracking
Microsoft ADO (number only): 25931321
How I did it
Upgrade xgs SAI version in sai.mk file.

How to verify it
Run full qualification on 7050cx3/7260cx3:

7050cx3:
https://dev.azure.com/mssonic/internal/_build/results?buildId=425450&view=results
https://dev.azure.com/mssonic/internal/_build/results?buildId=425449&view=results
7260cx3: https://elastictest.org/scheduler/testplan/656f2b2b617fb27e41557494?leftSideViewMode=detail&prop=status&order=ascending

Author: Gfrom2016

platform/broadcom/sai.mk

@@ -1,6 +1,6 @@
-LIBSAIBCM_XGS_VERSION = 8.4.31.0
+LIBSAIBCM_XGS_VERSION = 10.1.0.0
 LIBSAIBCM_DNX_VERSION = 7.1.111.1
-LIBSAIBCM_XGS_BRANCH_NAME = SAI_8.4.0_GA
+LIBSAIBCM_XGS_BRANCH_NAME = SAI_10.1.0_GA
 LIBSAIBCM_DNX_BRANCH_NAME = REL_7.0_SAI_1.11
 LIBSAIBCM_XGS_URL_PREFIX = "https://sonicstorage.blob.core.windows.net/public/sai/sai-broadcom/$(LIBSAIBCM_XGS_BRANCH_NAME)/$(LIBSAIBCM_XGS_VERSION)/xgs"
 LIBSAIBCM_DNX_URL_PREFIX = "https://sonicstorage.blob.core.windows.net/public/sai/bcmsai/$(LIBSAIBCM_DNX_BRANCH_NAME)/$(LIBSAIBCM_DNX_VERSION)"