chore(updatecli): fix rhel-latest-tag.sh script

[lemeurherve]

This change simplifies the command to extract the latest tag name from RedHat API as it doesn't seem to mention any "latest" anymore.

Fix:

• Updatecli manifest for RHEL is failing #2343

Testing done

curl --silent --fail --location --connect-timeout 10 --retry 3 --retry-delay 2 --max-time 30 --header 'accept: application/json' 'https://catalog.redhat.com/api/containers/v1/repositories/registry/registry.access.redhat.com/repository/ubi9/images?page_size=100&page=0&sort_by=last_update_date%5Bdesc%5D' | jq -r '.data[].repositories[].tags[].name' | grep '-' | sort -u | tail -n 1
9.7-1778461714

Submitter checklist

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests that demonstrate the feature works or the issue is fixed

[lemeurherve]

I've kept the filter on - but I'm not even sure it's required as (from what I can tell) all tags contain a dash:

$ curl --silent --fail --location --connect-timeout 10 --retry 3 --retry-delay 2 --max-time 30 --header 'accept: application/json' 'https://catalog.redhat.com/api/containers/v1/repositories/registry/registry.access.redhat.com/repository/ubi9/images?page_size=100&page=0&sort_by=last_update_date%5Bdesc%5D' \
| jq -r '.data[].repositories[].tags[].name' \
| sort -u                       
9.7-1762948793
9.7-1763340522
9.7-1764163501
9.7-1764578509
9.7-1764794285
9.7-1766364927
9.7-1767674301
9.7-1768785530
9.7-1769057030
9.7-1769417801
9.7-1770238273
9.7-1771346757
9.7-1773204657
9.7-1773895171
9.7-1774227732
9.7-1774415752
9.7-1775575763
9.7-1775624009
9.7-1776113524
9.7-1776315208
9.7-1776645994
9.7-1776834047
9.7-1777392539
9.7-1777525589
9.7-1777858048
9.7-1778044007
9.7-1778461714