Remove unncessary one-time workaround from the digest updater GHA

This change was never intended to be merged as it was marked with the
DONT COMMIT message in the draft PR. Since it got merged and the GHA has
been executed updating the base images for the new N (2024b) version, we
can safely remove this workaround now.

Author: jstourac

.github/workflows/notebooks-digest-updater-upstream.yaml

@@ -82,8 +82,7 @@ jobs:
             skopeo_metadata=$(skopeo inspect --retry-times 3 "docker://${img}")
 
             src_tag=$(echo "${skopeo_metadata}" | jq '.Env[] | select(startswith("OPENSHIFT_BUILD_NAME=")) | split("=")[1]' | tr -d '"' | sed 's/-amd64$//')
-            src_tag2=$(echo $src_tag | sed 's/python-3.9/python-3.11/')
-            regex="^$src_tag2-${{ env.RELEASE_VERSION_N}}-\d+-${{ steps.hash-n.outputs.HASH_N }}\$"
+            regex="^$src_tag-${{ env.RELEASE_VERSION_N}}-\d+-${{ steps.hash-n.outputs.HASH_N }}\$"
             latest_tag=$(echo "${skopeo_metadata}" | jq -r --arg regex "$regex" '.RepoTags | map(select(. | test($regex))) | .[0]')
             # use `--no-tags` for skopeo once available in newer version
             digest=$(skopeo inspect --retry-times 3 "docker://${registry}:${latest_tag}" | jq .Digest | tr -d '"')