fix: Uses release-charm@2.5.0-rc

[saltiyazan]

Description

The promote action seems to break because of the recent move from using metadata.yaml to centrealizing everything in charmcraft.yaml. 2.5.0-rc should include a fix to this.
Error message:

Run canonical/charming-actions/release-charm@2.4.0
/usr/bin/sudo snap install charmcraft --classic --channel latest/stable
charmcraft 2.6.0 from Canonical** installed
Error: ENOENT: no such file or directory, open 'metadata.yaml'
Error: Error: ENOENT: no such file or directory, open 'metadata.yaml'

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that validate the behaviour of the software
• I validated that new and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have bumped the version of the library