Use Signal instead of PGP to contact me securely (#3685)

Author: djmitche

SECURITY.md

@@ -1,6 +1,6 @@
 # Security
 
-To report a vulnerability, please contact [[email protected]](mailto:[email protected]), you may use GPG public-key D8097934A92E4B4210368102FF8B7AC6154E3226 which is available [here](https://keybase.io/djmitche/pgp_keys.asc?fingerprint=d8097934a92e4b4210368102ff8b7ac6154e3226).
+To report a vulnerability, please contact Dustin via signal, [`djmitche.78`](https://signal.me/#eu/2T98jpkMAzvFL2wg3OkZnNrfhk1DFfu6eqkMEPqcAuCsLZPVk39A67rp4khmrMNF).
 Initial response is expected within ~48h.
 
 We kindly ask to follow the responsible disclosure model and refrain from sharing information until: