Merge pull request EthicalSource#750 from vakila/add-mapbox

Add Mapbox to adopters

Author: CoralineAda

static/adopters.csv

@@ -134,6 +134,7 @@ Linux, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit
 Lolcommits Plugins, https://github.com/search?q=topic%3Alolcommits-plugin+org%3Alolcommits
 Lolcommits, https://github.com/mroth/lolcommits
 Mailchain, https://github.com/mailchain/mailchain
+Mapbox, https://github.com/mapbox
 Maximilian, https://github.com/equinoxfitness/maximilian
 Marquez, https://github.com/MarquezProject/marquez
 Mensa, https://github.com/jordanekay/Mensa