Misleading instructions for uploading public key

When I go to upload my **public** key, the page suggests the following commands to display my public key:

```
# tip: first list your keys in GPG
gpg -K --keyid-format long --with-colons --with-fingerprint
# then export the one you want (look next to `fpr`)
gpg --export -a A4AA3A5BDBD40EA549CABAF9FBC07D6A97016CB3
```

The first command uses the long form arguments for everything except the `-K`, which checking the man page tells me it is for listing the **secret** key, not the **public** key. As far as I can tell, there is only one fingerprint for the public/secret pair, so there is no need to use `-K` or `--list-secret-keys` and the instructions could be changed to the following:

```
# tip: first list your keys in GPG
gpg --list-keys --keyid-format long --with-colons --with-fingerprint
```

Start at the public-key upload page and locate the GPG instructions shown when uploading a public key. Compare the key-listing command with the issue's proposed public-key form, then verify that the displayed instructions consistently list and export the intended public key.

Written by the indexing model from the issue text.