fixed typo 'managing'

Author: mletalie

operators/admin/olm-managing-custom-catalogs.adoc

@@ -6,7 +6,7 @@ include::_attributes/common-attributes.adoc[]
 
 toc::[]
 
-Cluster administrators and Operator catalog maintainers can create and managing custom catalogs packaged using the xref:../../operators/understanding/olm-packaging-format.adoc#olm-bundle-format_olm-packaging-format[bundle format] on Operator Lifecycle Manager (OLM) in {product-title}.
+Cluster administrators and Operator catalog maintainers can create and manage custom catalogs packaged using the xref:../../operators/understanding/olm-packaging-format.adoc#olm-bundle-format_olm-packaging-format[bundle format] on Operator Lifecycle Manager (OLM) in {product-title}.
 
 [IMPORTANT]
 ====