Update vendored Pip's CA cert bundle. (#2630) #3287

Job	Run time
Check GitHub Organization	1s
tox -e format-check,lint-check,typecheck,enum-check,vendor-check,package,docs	11m 21s
./dtox.sh -e py27-pip20	9m 28s
tox -e py313-pip24_3_1	16m 7s
./dtox.sh -e py38-pip22_3_1	17m 31s
tox -e py313-pip24_3_1-integration --shard 1/2	29m 32s
./dtox.sh -e py311-pip23_3_2	19m 47s
tox -e py313-pip24_3_1-integration --shard 2/2	45m 1s
./dtox.sh -e py313-pip24_3_1	14m 10s
./dtox.sh -e py314-pip24_3_1	14m 33s
./dtox.sh -e pypy310-pip24_3_1	27m 54s
./dtox.sh -e py27-pip20-integration	28m 41s
./dtox.sh -e py38-pip22_3_1-integration --shard 1/2	31m 0s
./dtox.sh -e py38-pip22_3_1-integration --shard 2/2	29m 33s
./dtox.sh -e py311-pip23_3_2-integration --shard 1/2	29m 52s
./dtox.sh -e py311-pip23_3_2-integration --shard 2/2	29m 14s
./dtox.sh -e py313-pip24_3_1-integration --shard 1/2	27m 50s
./dtox.sh -e py313-pip24_3_1-integration --shard 2/2	27m 6s
./dtox.sh -e py314-pip24_3_1-integration --shard 1/2	29m 44s
./dtox.sh -e py314-pip24_3_1-integration --shard 2/2	26m 17s
./dtox.sh -e pypy310-pip24_3_1-integration --shard 1/2	47m 50s
./dtox.sh -e pypy310-pip24_3_1-integration --shard 2/2	49m 24s
Gather Final Status	1s
	9h 21m 57s

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