Less dominant construction color

[kocio-pl]

Resolves #1197.

As originally proposed by @daganzdaanda, made 10% lighter with 5% desaturation. Lightening stops hinting that construction areas are more important than buildings and desaturation takes away the golden tint, which is currently overused in osm-carto, making also construction area more distinct than lightened-only version.

1. City landscape, comparison with bigger buildings
   Before
   

After

2. City detail, comparison with buildings, trees and special buildings (tagged as place of worship)
   Before
   

After

3. City detail, comparison with buildings and landuse=garages
   

4. City detail, buildings on construction area
   

[EdLoach]

"Lightening stops hinting that construction areas are more important than buildings" - except that construction areas are more important than buildings, as they indicate to mappers that they need regular re-surveying to check on progress. Of course these days they are usually supplemented by notes with comments used to give progress updates, so how they look on the tiles is less important than it was. I have no real opinion on how they should look though.

[kocio-pl]

General map should be careful with what it shows as important. In my opinion it should rather explain the space than deal with searching things. Mappers should use data-related tools (like Overpass query or special layer) to not overlook smaller construction sites.