[BUG] Add latest tag to el9 container

[asalois]

The el9 image needs to be tagged to latest.

podman pull ghcr.io/openchami/image-build-el9
Trying to pull ghcr.io/openchami/image-build-el9:latest...
Error: initializing source docker://ghcr.io/openchami/image-build-el9:latest: reading manifest latest in ghcr.io openchami/image-build-el9: manifest unknown

Pulling only works when selecting the correct tag

podman pull ghcr.io/openchami/image-build-el9:v0.1.1
Trying to pull ghcr.io/openchami/image-build-el9:v0.1.1...
Getting image source signatures
Copying blob 5c843bf56876 done   |
Copying blob b4125a0b5197 done   |
Copying blob 4856fa76fa6e done   |
Copying blob 216950d23005 done   |
Copying blob 266afa718f49 done   |
Copying blob 441b1ee28891 skipped: already exists
Copying blob 4b8b473773f0 done   |
Copying blob 4aba8d485fc2 done   |
Copying blob c185d7bd4207 done   |
Copying blob 2362992dcb35 done   |
Copying blob 4f4fb700ef54 skipped: already exists
Copying config fad5a2f4e2 done   |
Writing manifest to image destination
fad5a2f4e213933df4e1e5debe1eba19ca834be256397e4173d1dc7839e20437