Merge #109: doc: gitian-keys is now builder-keys

ba44590 doc: gitian-keys is now builder-keys (W. J. van der Laan)

Pull request description:

  Even though this script is specific to gitian, the rename of the directory where the keys.txt file is affects its use.

Top commit has no ACKs.

Tree-SHA512: 7a742861baf01878a6ad2c864612088beabbb89046eff0a71dda43d65ece691e65f64a51532bc436a8198dd01ecc988ef96fdc69e3e2aad552e75661a502769f

Author: fanquake

README.md

@@ -292,15 +292,15 @@ pip3 install --user pyyaml gpg
 (or install the distribution package, in Debian/Ubuntu this is `python3-yaml` and `python3-gpg`)
 
 The `gpg` module requires the [gpgme](https://www.gnupg.org/software/gpgme/index.html) library
-which is usually present on Linux, and can be installed with `brew install gpgme` on macOS. 
+which is usually present on Linux, and can be installed with `brew install gpgme` on macOS.
 
-Example usage: `./gitian-verify.py -r 0.21.0rc5 -d ../gitian.sigs -k ../bitcoin/contrib/gitian-keys/keys.txt`
+Example usage: `./gitian-verify.py -r 0.21.0rc5 -d ../gitian.sigs -k ../bitcoin/contrib/builder-keys/keys.txt`
 
 Where
 
 - `-r 0.21.0rc5` specifies the release to verify signatures for.
 - `-d ../gitian.sigs` specifies the directory where the repository with signatures, [gitian.sigs](https://github.com/bitcoin-core/gitian.sigs/) is checked out.
-- `../bitcoin/contrib/gitian-keys/keys.txt` is the path to `keys.txt` file inside the main repository that specifies the valid keys and what signers they belong to.
+- `../bitcoin/contrib/builder-keys/keys.txt` is the path to `keys.txt` file inside the main repository that specifies the valid keys and what signers they belong to.
 
 Example output:
 ```