Add v162 release

Since the changelog was not updated when #487 was released:

```
$ h buildpacks:versions heroku/go | head -n4
Version  Released At               Status
───────  ────────────────────────  ─────────
162      2022-05-23T19:42:06.208Z  published
161      2022-03-15T22:11:28.510Z  published
```

CHANGELOG.md

@@ -1,14 +1,16 @@
 # Go Buildpack Changelog
 
 ## Unreleased
+* Use the go version in `go.mod` if no `+heroku` comment is found (#378/#411)
+
+## v162 (2022-03-23)
 * Add go1.17.9
 * Add go1.17.10
 * Add go1.18.1
 * Add go1.18.2
 * go1.17 defaults to 1.17.10
 * go1.18 defaults to 1.18.2
 * Add Heroku-22 to the Circle CI test matrix.
-* Use the go version in go.mod if no +heroku comment is found (#378)
 
 ## v161 (2022-03-15)
 * Add go1.15.11