[No ticket] add a link to the release-group subcommand in the readme (#1407)

* add a link to the release-group subcommand in the readme

* prep for release

Author: spatten

Changelog.md

@@ -1,5 +1,8 @@
 # FOSSA CLI Changelog
 
+## v3.9.11
+- Licensing: Add new rules for unity licenses. Add the Redis Source Available License.
+
 ## v3.9.10
 - Support unarchiving `tgz`, `taz`, `txz`, `tbz`, `tbz2`, and `tz2` files for `--unpack-archives` ([#1402](https://github.com/fossas/fossa-cli/pull/1402/files))
 - `fossa test`: improves diagnostic message ([#1403](https://github.com/fossas/fossa-cli/pull/1403/files))

docs/README.md

@@ -133,6 +133,7 @@ Concept guides explain the nuances behind how basic FOSSA primitives work. If yo
 - [`fossa report`](./references/subcommands/report.md): Download a report of the most recent scan of a project.
 - [`fossa snippets`](./references/subcommands/snippets.md): Analyze snippets of a project and check if they exist in other open source projects FOSSA knows about.
 - [`fossa test`](./references/subcommands/test.md): View the results of the most recent scan of a project.
+- [`fossa release-group`](./references/subcommands/release-group.md): Interact with FOSSA release groups.
 
 #### Configuration