Update jaegertracing/jaeger-operator Docker tag to v1.21.1

This MR contains the following updates:

Package	Type	Update	Change
jaegertracing/jaeger-operator	ironbank-docker	minor	1.20.0 -> 1.21.1
jaegertracing/jaeger-operator		minor	1.20.0 -> 1.21.1
jaegertracing/jaeger-operator	stage	minor	1.20.0 -> 1.21.1

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