Add another signing key

.guix-authorizations

@@ -1,4 +1,6 @@
 (authorizations
   (version 0)
   (("BF2C984D163E47CAAA95AD589B06663352168487"
-   (name "nathanmcrae-key_ei"))))
+   (name "nathanmcrae-key_ei"))
+   ("CCB0642F99B82F07FFAAF67373FC1CAF2F971154"
+   (name "nathanmcrae-key_nk"))))

nathanmcrae-key_nk.key

@@ -0,0 +1,19 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+
+mFMEagNzIhMJKyQDAwIIAQEHAgMEFfpcGNSyMJsIVM6I2jQ5MkKzLZ7ZC54atdxI
+XfIamUV24HYFhqKMAUpgL8zi4+qwSGtc3SfWj/G650JgfrgGz7QuTmF0aGFuIENo
+cmlzdG9waGVyIE1jUmFlIDxtZUBuYXRoYW5tY3JhZS5uYW1lPoiZBBMTCABBFiEE
+zLBkL5m4Lwf/qvZzc/wcry+XEVQFAmoDcyICGwMFCQWk8Y4FCwkIBwICIgIGFQoJ
+CAsCBBYCAwECHgcCF4AACgkQc/wcry+XEVSGOQD/THBxDaYsJouM07pb0rFEZ2C8
+lmCJ35i+jB4Bai9CldwBAJET0C4vUHb8PM5O/3D0LVMjvrF3peZ3DfBdYjZswoPj
+uFMEagNzIhMJKyQDAwIIAQEHAgMEK+1HrwfGjLN75W2j9zKlBg81Avcey4PFRUc9
+0lgpIOmT8WLK2xU0IEjZUhSRomzqa2tZsPxIkODxaQSX2IDQuoh+BBgTCAAmFiEE
+zLBkL5m4Lwf/qvZzc/wcry+XEVQFAmoDcyICGyAFCQWk8Y4ACgkQc/wcry+XEVSv
+hgD+LFufL+OCrgHPpAlj6fMGS6IFHT13JwNJcg+0hyAOQMgBAJ5rQ5gg01Rc810U
+2o0TF2DaEAxIjeiTMKjgOj9WOQpguFcEagNzIhIJKyQDAwIIAQEHAgMEnHW71RpQ
+6JQvpbNAzbfR84wQffiWesFL4l4e9hfyuhUNf2RFQMxRQBA5sIXwEqgumzehWcSB
+6mG95Fw+c9M6xgMBCAeIfgQYEwgAJhYhBMywZC+ZuC8H/6r2c3P8HK8vlxFUBQJq
+A3MiAhsMBQkFpPGOAAoJEHP8HK8vlxFUbtsBAJSBVUHGjpZTALBPHedNoyTdLfXS
+JnRBhKb7/m1GCS6wAQCgkBZnxsqSYwmVg9Cy/OpKWMvOjyQREw5W2txnDQSgrQ==
+=Jc0d
+-----END PGP PUBLIC KEY BLOCK-----