Data URL points to inflation data instead of CPI data

[JakubChudik]

Reference: https://github.com/datasets/cpi/blob/3750e45064a99b0452deb1423a416e4d5473a58e/scripts/cpi2datapackage.py#L12

The correct cpi_source should be 'https://api.worldbank.org/v2/en/indicator/FP.CPI.TOTL?downloadformat=csv'

Also, the reference year is now 2010, not 2005.