chore: bump Fabric8 client to 7.6.1 (#3203) #6502

Job	Run time
sample_operators_tests (sample-operators/tomcat-operator)	3m 24s
sample_operators_tests (sample-operators/leader-election)	3m 49s
sample_operators_tests (sample-operators/webpage)	3m 44s
sample_operators_tests (sample-operators/mysql-schema)	3m 13s
	14m 10s

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