Site: Remove instructions to close Nexus repository when building a rc as this is now automated
Site: Remove instructions to close Nexus repository when building a rc as this is now automated

apache/calcite-avatica,looker-open-source/calcite-avatica,looker-open-source/calcite-avatica,looker-open-source/calcite-avatica,apache/calcite-avatica,looker-open-source/calcite-avatica,apache/calcite-avatica,apache/calcite-avatica,looker-open-source/calcite-avatica,apache/calcite-avatica