utils/upload_kalkun_deps_to_ppa.sh: fix determination of vendor #226

Job	Run time
Debian package	11m 26s
Get PHP versions to pack for	3s
Prebuild packages by PHP version	2m 9s
Create artifacts for 8.2.12	28s
Create artifacts for 8.0	4s
Create artifacts for 8.1	5s
Create artifacts for 8.2	10s
Create artifacts for 8.3	4s
Create artifacts for 7.0	11s
Create artifacts for 7.1	5s
Create artifacts for 7.2	4s
Create artifacts for 7.3	11s
Create artifacts for 7.4	4s
Create artifacts for 5.6	4s
Create release and add packages	0s
Delete temporary artifact	0s
	15m 8s

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