Merge pull request #37875 from kelbrown20/adding-alternative-to-grpcurl-1922741

BZ:1922741 - Adding alternative to grpcurl command

Author: EricPonvelle

modules/olm-pruning-index-image.adoc

@@ -39,7 +39,7 @@ ifeval::["{context}" != "olm-managing-custom-catalogs"]
 * Workstation with unrestricted network access
 endif::[]
 * `podman` version 1.9.3+
-* link:https://github.com/fullstorydev/grpcurl[`grpcurl`]
+* link:https://github.com/fullstorydev/grpcurl[`grpcurl`] (third-party command-line tool)
 * `opm` version 1.18.0+
 * Access to a registry that supports
 link:https://docs.docker.com/registry/spec/manifest-v2-2/[Docker v2-2]