Fixed the broken link (#780)

Author: pabel-rh

modules/installation/proc-install-rhdh-airgapped-environment-ocp-operator.adoc

@@ -41,7 +41,7 @@ The internal {ocp-short} cluster image registry cannot be used as a target mirro
 ** The `htpasswd` command is available. For {rhel}, the `htpasswd` command is available by installing the `httpd-tools` package.
 
 .Procedure
-. Download and run the mirroring script to install a custom Operator catalog and mirror the related images: `prepare-restricted-environment.sh` (link:https://github.com/redhat-developer/rhdh-operator/blob/{product-version}.x/.rhdh/scripts/prepare-restricted-environment.sh[source]).
+. Download and run the mirroring script to install a custom Operator catalog and mirror the related images: `prepare-restricted-environment.sh` (link:https://github.com/redhat-developer/rhdh-operator/blob/release-{product-version}/.rhdh/scripts/prepare-restricted-environment.sh[source]).
 +
 [source,yaml,subs="attributes+"]
 ----