Fix incorrect regex for PEX_PYTHON precision warning (#2622) #3265

Job	Run time
Check GitHub Organization	1s
tox -e format-check,lint-check,typecheck,enum-check,vendor-check,package,docs	10m 22s
tox -e py313-pip24_3_1	16m 46s
tox -e py313-pip24_3_1-integration --shard 1/2	38m 38s
./dtox.sh -e py27-pip20	10m 11s
tox -e py313-pip24_3_1-integration --shard 2/2	42m 42s
./dtox.sh -e py38-pip22_3_1	18m 24s
./dtox.sh -e py311-pip23_3_2	18m 50s
./dtox.sh -e py313-pip24_3_1	14m 16s
./dtox.sh -e py314-pip24_3_1	14m 52s
./dtox.sh -e pypy310-pip24_3_1	28m 5s
./dtox.sh -e py27-pip20-integration	29m 2s
./dtox.sh -e py38-pip22_3_1-integration --shard 1/2	31m 13s
./dtox.sh -e py38-pip22_3_1-integration --shard 2/2	29m 51s
./dtox.sh -e py311-pip23_3_2-integration --shard 1/2	30m 34s
./dtox.sh -e py311-pip23_3_2-integration --shard 2/2	29m 56s
./dtox.sh -e py313-pip24_3_1-integration --shard 1/2	28m 1s
./dtox.sh -e py313-pip24_3_1-integration --shard 2/2	26m 59s
./dtox.sh -e py314-pip24_3_1-integration --shard 1/2	29m 57s
./dtox.sh -e py314-pip24_3_1-integration --shard 2/2	26m 48s
./dtox.sh -e pypy310-pip24_3_1-integration --shard 1/2	47m 35s
./dtox.sh -e pypy310-pip24_3_1-integration --shard 2/2	48m 43s
Gather Final Status	1s
	9h 31m 47s

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