Fix GPG verify path for staged release artifacts #562

Job	Run time
check-skip	4s
Build Apache Cloudberry DEB	16m 31s
prepare-test-matrix-deb	4s
DEB Install Test Apache Cloudberry	2m 0s
ic-deb-gpcontrib	4m 4s
pax-ic-deb-good-opt-off	23m 56s
pax-ic-deb-good-opt-on	27m 40s
ic-deb-good-opt-on	30m 57s
ic-deb-good-opt-off	25m 18s
ic-deb-contrib	4m 36s
ic-cbdb-parallel	28m 38s
Generate Apache Cloudberry Build Report	4s
	2h 43m 52s

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