Add World Cup 2022

Author: jayb

world-cup-2022/README.md

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+---
+files:
+  - https://projects.fivethirtyeight.com/soccer-api/international/2022/wc_matches.csv
+  - https://projects.fivethirtyeight.com/soccer-api/international/2022/wc_forecasts.csv
+---
+# World Cup 2022
+
+This file contains links to the data behind our [2022 World Cup Predictions](https://projects.fivethirtyeight.com/2022-world-cup-predictions/).
+
+`wc_matches.csv` contains match-by-match projections.
+
+`wc_forecasts.csv` contains our tournament forecasts.