Fix syntax error opening coredump_filter in wt_hang_analyzer.py

make-check-test failed on * Windows 64-bit CMake

Host: ec2-107-23-210-8.compute-1.amazonaws.com
Project: WiredTiger (develop)
Commit: diff: WT-8651 Allow checkpoint scrubbing during shutdown (#7409)

Eviction is allowed during the shutdown checkpoint, so performing
checkpoint scrubbing can improve the shutdown checkpoint performance. | 10 Jan 22 21:03 UTC
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Task Logs (make-check-test)