testsuite: extend timeout in t2201-job-cmd.t #2304

Job	Run time
Generate build matrix	9s
spelling	8s
python linting	1m 9s
validate commits	0s
bookworm	28m 41s
bookworm - 32 bit	24m 27s
bookworm - gcc-12,content-s3,distcheck	27m 57s
bookworm - py3.11,clang-15	32m 53s
coverage	45m 25s
jammy - test-install	18m 9s
bookworm - test-install	17m 29s
focal - py3.8	24m 23s
el8	39m 41s
el8 - ascii	28m 37s
el8 - system,coverage	11m 48s
fedora34 - gcc-11.2,py3.9	24m 48s
fedora38 - gcc-13.1,py3.11	23m 3s
inception	26m 44s
flux-sched check	11m 12s
flux-accounting check	7m 8s
Generate docker manifest	1s
	6h 33m 52s

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