CI: Copr-release - change default container from ol8 to ol9 #257

Job	Run time
check / include-orders	4s
check / editor-config	5s
check / clang-checks	2m 7s
check / doxygen	1m 7s
check / cppcheck / cppcheck-test	13s
build-os-matrix	4s
build (rockylinux:9) / build	1m 15s
build (oraclelinux:10) / build	1m 15s
build (fedora:38) / build	1m 47s
build (oraclelinux:9) / build	1m 32s
rpm-test (oraclelinux:10) / test	17s
rpm-test (rockylinux:9) / test	15s
rpm-test (fedora:38) / test	42s
make-test (rockylinux:9) / make-test	1m 35s
rpm-test (oraclelinux:9) / test	34s
make-test (oraclelinux:9) / make-test	1m 56s
make-test (oraclelinux:10) / make-test	1m 44s
make-test (fedora:38) / make-test	2m 16s
	18m 48s

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