README.md: add cmd/dbdiff
Change-Id: Icb98be0f04739b7cc094c42e0b540b4ce5683c92
Reviewed-on: https://go-review.googlesource.com/c/vulndb/+/353877
Trust: Julie Qiu <julie@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>
diff --git a/README.md b/README.md
index c0fae23..7643dd2 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,7 @@
from a `report.Report`
* `client` contains a client for accessing HTTP/fs based vulnerability
databases, as well as a minimal caching implementation
+* `cmd/dbdiff` provides a tool for comparing two different versions of the vulnerability database
* `cmd/gendb` provides a tool for converting TOML reports into JSON database
* `cmd/genhtml` provides a tool for converting TOML reports into a HTML website
* `cmd/linter` provides a tool for linting individual reports
