`update.sh` updates all versions for non-matching version input

Environment

• Platform: Ubuntu 24.04.4 LTS
• Docker Version: N/A
• Node.js Version: 24.14.1
• Image Tag: N/A

Expected Behavior

If the update.sh script is run using a MAJOR_VERSION that is not set up, such as 23 (EOL) or 26 (not yet released), the script should fail with an error message.

Current Behavior

The script acts as though no MAJOR_VERSION was specified and updates all available versions.

Possible Solution

Steps to Reproduce

Execute:

./update.sh -s 26

Additional Information

Logs

$ ./update.sh -s 26
Updating version 20...
Updating version 22...
Updating version 24...
Updating version 25...
20/bookworm-slim/Dockerfile is already up to date!
20/bookworm/Dockerfile is already up to date!
20/bullseye-slim/Dockerfile is already up to date!
20/bullseye/Dockerfile is already up to date!
20/trixie-slim/Dockerfile is already up to date!
20/trixie/Dockerfile is already up to date!
22/trixie/Dockerfile is already up to date!
22/bookworm/Dockerfile is already up to date!
22/trixie-slim/Dockerfile is already up to date!
22/bookworm-slim/Dockerfile is already up to date!
22/bullseye/Dockerfile is already up to date!
22/bullseye-slim/Dockerfile is already up to date!
24/bullseye-slim/Dockerfile is already up to date!
24/bookworm-slim/Dockerfile is already up to date!
24/bookworm/Dockerfile is already up to date!
25/bullseye/Dockerfile is already up to date!
25/bookworm/Dockerfile is already up to date!
24/bullseye/Dockerfile is already up to date!
24/trixie-slim/Dockerfile is already up to date!
24/trixie/Dockerfile is already up to date!
25/bookworm-slim/Dockerfile is already up to date!
25/trixie/Dockerfile is already up to date!
25/bullseye-slim/Dockerfile is already up to date!
25/trixie-slim/Dockerfile is already up to date!
20/alpine3.22/Dockerfile is already up to date!
22/alpine3.22/Dockerfile is already up to date!
22/alpine3.23/Dockerfile is already up to date!
20/alpine3.23/Dockerfile is already up to date!
25/alpine3.23/Dockerfile is already up to date!
24/alpine3.22/Dockerfile is already up to date!
24/alpine3.23/Dockerfile is already up to date!
25/alpine3.22/Dockerfile is already up to date!
Done!

Start by reading update.sh, focusing on how the -s MAJOR_VERSION argument is parsed and matched against available versions. Run ./update.sh -s 26 to reproduce the current behavior, then verify that unsupported versions such as 23 or 26 fail with an error while supported versions continue updating normally.