Fixing linting warnings (using 'const' instead of 'let' when possible)
Fixes linting warnings introduced by the upgrade of the linter to a newer version. (These warnings were previously ignored).
The old module-image for the shared runners will be discontinued on October 31. All users still referencing gitlab-registry.mpcdf.mpg.de/mpcdf/module-image in their CI pipelines need to switch to the new CI images now, see instructions here.
Fixes linting warnings introduced by the upgrade of the linter to a newer version. (These warnings were previously ignored).