BLD: pin pcdsdevices to try to fix CI #252

Job	Run time
standard / Documentation / Python 3.9: documentation building	1m 9s
standard / pre-commit checks / pre-commit	14s
standard / Conda (3.12, true) / Python 3.12: conda	6m 48s
standard / Conda (3.9, true) / Python 3.9: conda	6m 59s
standard / Conda (3.10) / Python 3.10: conda	6m 40s
standard / Conda (3.11, true) / Python 3.11: conda	6m 45s
standard / Pip (3.10) / Python 3.10: pip	4m 56s
standard / Pip (3.11, true) / Python 3.11: pip	4m 51s
standard / Pip (3.9, true) / Python 3.9: pip	4m 51s
standard / Pip (3.12, true) / Python 3.12: pip	5m 20s
standard / Documentation / Documentation deployment	0s
	48m 33s

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