Clarify "precision" in currency format functions

The documentation of the FormatAccounting and FormatCurrency
functions could be clearer in terms of how the precision param
works. This commit makes it more explicit that adding a precision
of < 2 will not format the return values to include fewer decimals.

Resolves gohugoio#8858

docs/data/docs.json

@@ -3903,7 +3903,7 @@
  },
  "lang": {
  "FormatAccounting": {
- "Description": "FormatAccounting returns the currency reprecentation of number for the given currency and precision\nfor the current language in accounting notation.",
+ "Description": "FormatAccounting returns the currency representation of number for the given currency and precision\nfor the current language in accounting notation.\n\nThe return value is formatted with at least two decimal places.",
  "Args": [
  "precision",
  "currency",
@@ -3918,7 +3918,7 @@
  ]
  },
  "FormatCurrency": {
- "Description": "FormatCurrency returns the currency reprecentation of number for the given currency and precision\nfor the current language.",
+ "Description": "FormatCurrency returns the currency representation of number for the given currency and precision\nfor the current language.\n\nThe return value is formatted with at least two decimal places.",
  "Args": [
  "precision",
  "currency",