* retrieve urban population fraction from World Bank API
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
The source URL has changed. It represents the year 2012 and is only
for buildings, not district heating. So the capacities for urban
central are now set to zero from this source.
