(chocolatey#2615) Reference CREDITS file for other licenses

Author: pauby

NOTICE

@@ -12,3 +12,7 @@
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
+
+   Additional legal information and licenses used by Chocolatey CLI can be
+   found in the CREDITS file or at
+   https://github.com/chocolatey/choco/blob/develop/docs/legal/CREDITS.md