Remove spaces from Fingerprint

On https://keybase.io/docs/server_security/our_code_signing_key is the fingerprint listed, but its uncomfortable to import it, because its space-separated. And there is no way to download the key.

To use it with GPG Keychain, I either need a keyfile or a non-space separated fingerprint to load it from a keyserver.

Open the server security page at keybase.io/docs/server_security/our_code_signing_key and inspect how the fingerprint is displayed and whether a key download is provided. Done means the signing key can be obtained or its fingerprint used for import without manually removing spaces; verify the updated page and import instructions.

Written by the indexing model from the issue text.