README: Fix "field" -> "fields" typo in caveat section

This snuck in with 954a3468 (pull: Update to the SPDX License List
3.0, 2017-12-29, #9), which added "tags" to the sentence but forgot to
make "field" plural.

diff --git a/README.md b/README.md
index e0cda243da781f774c9b48c96fd21bb2c73771fd..f2de1b3f96250b48e498146fb0f6b9f47573f93b 100644 (file)
--- a/README.md
+++ b/README.md
@@ -80,7 +80,7 @@ There are currently some hacks in [the pulling script](pull.py):
 * `TAG_OVERRIDES`, which sets `tags` where the human-readable text on the [FSF's annotated list][fsf-list] has more detail than the easily-machine-readable content.
     For example, the FSF currently only distinguishes between `gpl-2-compatible` and `gpl-3-compatible` in text, so licenses that are only compatible with one or the other need tag overrides.
 
-Until these hacks are addressed, license IDs and the `tags` and `identifiers` field should be taken with a grain of salt.
+Until these hacks are addressed, license IDs and the `tags` and `identifiers` fields should be taken with a grain of salt.
 
 ## Contributing