Fix some issues reported by lintian

Fix some issues reported by lintian

• Trim trailing whitespace. (trailing-whitespace)

• Set upstream metadata fields: Bug-Database, Bug-Submit, Repository, Repository-Browse. (upstream-metadata-file-is-missing, upstream-metadata-missing-bug-tracking, upstream-metadata-missing-repository)

• Update pattern for GitHub archive URLs from ///tags page///archive/ -> ///archive/refs/tags/.

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Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/gnome-shell-extension-hard-disk-led/aa689ad6-075a-439e-a3a7-8154cb872a48.

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