Typo in the doc, 's' missing in opensuse_leap15_4-backports-update repo name

[phibid]

Noticed that the 's' is missing in the doc installation-and-upgrade/proxy-uyuni.html for the repository name opensuse_leap15_4-backports-update which is in fact called opensuse_leap15_4-backports-updates in spacewalk-common-channels.ini.

Therefore, I can see lots of references to the wrong repository name in the doc:

:~/uyuni-docs$ grep -ir opensuse_leap15_4-backports-update
l10n-weblate/installation-and-upgrade/ko.po:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/installation-and-upgrade/ko.po:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/installation-and-upgrade/cs.po:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/installation-and-upgrade/cs.po:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/installation-and-upgrade/installation-and-upgrade.pot:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/installation-and-upgrade/installation-and-upgrade.pot:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/installation-and-upgrade/es.po:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/installation-and-upgrade/es.po:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/installation-and-upgrade/ja.po:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/installation-and-upgrade/ja.po:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/installation-and-upgrade/zh_CN.po:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/installation-and-upgrade/zh_CN.po:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/installation-and-upgrade/pt_BR.po:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/installation-and-upgrade/pt_BR.po:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/client-configuration/ko.po:"| opensuse_leap15_4-backports-update\n"
l10n-weblate/client-configuration/cs.po:"| opensuse_leap15_4-backports-update\n"
l10n-weblate/client-configuration/es.po:"| opensuse_leap15_4-backports-update\n"
l10n-weblate/client-configuration/client-configuration.pot:"| opensuse_leap15_4-backports-update\n"
l10n-weblate/client-configuration/ja.po:"| opensuse_leap15_4-backports-update\n"
l10n-weblate/client-configuration/zh_CN.po:"| opensuse_leap15_4-backports-update\n"
l10n-weblate/client-configuration/pt_BR.po:"| opensuse_leap15_4-backports-update\n"
l10n-weblate/quickstart/ko.po:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/quickstart/cs.po:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/quickstart/es.po:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/quickstart/ja.po:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/quickstart/zh_CN.po:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/quickstart/pt_BR.po:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/quickstart/quickstart.pot:"opensuse_leap15_4-backports-update \\\n"
l10n-weblate/retail/ko.po:"| opensuse_leap15_4-backports-update\n"
l10n-weblate/retail/cs.po:"| opensuse_leap15_4-backports-update\n"
l10n-weblate/retail/es.po:"| opensuse_leap15_4-backports-update\n"
l10n-weblate/retail/ja.po:"| opensuse_leap15_4-backports-update\n"
l10n-weblate/retail/zh_CN.po:"| opensuse_leap15_4-backports-update\n"
l10n-weblate/retail/retail.pot:"| opensuse_leap15_4-backports-update\n"
modules/installation-and-upgrade/pages/uyuni-proxy-registration.adoc:opensuse_leap15_4-backports-update \
modules/installation-and-upgrade/pages/proxy-uyuni.adoc:opensuse_leap15_4-backports-update \
modules/installation-and-upgrade/pages/proxy-autoyast-uyuni.adoc:opensuse_leap15_4-backports-update \
modules/client-configuration/pages/clients-opensuseleap.adoc:| opensuse_leap15_4-backports-update
modules/quickstart/pages/install-uyuni-proxy.adoc:opensuse_leap15_4-backports-update \
modules/quickstart/pages/quickstart-install-uyuni-proxy.adoc:opensuse_leap15_4-backports-update \
modules/retail/pages/retail-uyuni-branchserver.adoc:| opensuse_leap15_4-backports-update