docs: add flynn378 as a contributor for bug, and maintenance (#424)

* docs: update README.md [skip ci]
* docs: update .all-contributorsrc [skip ci]

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>

.all-contributorsrc

@@ -125,6 +125,16 @@
       "contributions": [
         "plugin"
       ]
+    },
+    {
+      "login": "flynn378",
+      "name": "Toby Flynn",
+      "avatar_url": "https://avatars.githubusercontent.com/u/6114517?v=4",
+      "profile": "https://github.com/flynn378",
+      "contributions": [
+        "bug",
+        "maintenance"
+      ]
     }
   ],
   "commitType": "docs",

README.md

@@ -4,7 +4,7 @@
 
 [![License](https://img.shields.io/badge/License-LGPL%203.0-blue.svg)](https://opensource.org/licenses/LGPL-3.0)
 ![CMake](https://github.com/fair-acc/gnuradio4/workflows/CMake/badge.svg) <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-11-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-12-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 # GNU Radio 4.0 prototype
@@ -85,6 +85,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <tr>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/eltos"><img src="https://avatars.githubusercontent.com/u/19860638?v=4" width="100px;" alt=""/><br /><sub><b>Philipp Niedermayer</b></sub></a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/RalphSteinhagen"><img src="https://avatars.githubusercontent.com/u/46007894?v=4" width="100px;" alt=""/><br /><sub><b>Ralph J. Steinhagen</b></sub></a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/flynn378"><img src="https://avatars.githubusercontent.com/u/6114517?v=4" width="100px;" alt=""/><br /><sub><b>Toby Flynn</b></sub></a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/drslebedev"><img src="https://avatars.githubusercontent.com/u/25366186?v=4" width="100px;" alt=""/><br /><sub><b>drslebedev</b></sub></a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/mormj"><img src="https://avatars.githubusercontent.com/u/34754695?v=4" width="100px;" alt=""/><br /><sub><b>mormj</b></sub></a></td>
     </tr>