The package is already named specs, the file content is label
construction, and a separate metadata package exists at
internal/cnpgi/metadata; labels.go describes the file directly
without the package-name collision. BuildLabels also matches
the verb convention already used elsewhere in the package
(BuildRole, BuildRoleBinding, BuildRoleRules).
No behavior change.
Signed-off-by: Armando Ruocco <armando.ruocco@enterprisedb.com>