fix(docs): description of jq example didn't match behavior (#897)

* fix(docs): description of jq example didn't match behavior

I think this was wrong? Wish our examples were also executable...

---------

Co-authored-by: Derek Cormier <derek@aspect.dev>

docs/jq.md

diff --git a/docs/jq.md b/docs/jq.md
index 0d2df88..0927a90 100644
--- a/docs/jq.md
+++ b/docs/jq.md
@@ -29,6 +29,7 @@
 jq(
     name = "no_dev_deps",
     srcs = ["package.json"],
+    out = "package.json",
     filter = "del(.devDependencies)",
 )
 ```

lib/jq.bzl

diff --git a/lib/jq.bzl b/lib/jq.bzl
index 6fb5ea1..c8b01c5 100644
--- a/lib/jq.bzl
+++ b/lib/jq.bzl
@@ -27,6 +27,7 @@
 jq(
     name = "no_dev_deps",
     srcs = ["package.json"],
+    out = "package.json",
     filter = "del(.devDependencies)",
 )
 ```