Be consistent

In `/doc/encryption_and_privacy/encrypted_volumes.mdwn` VeraCrypt is
referred to as a disk encryption *tool* rather than a disk encryption
*software*.

wiki/src/doc/encryption_and_privacy/veracrypt.mdwn

@@ -6,7 +6,7 @@ Introduction to <span class="application">VeraCrypt</span>
 ==========================================================
 
 <span class="application">[VeraCrypt](https://www.veracrypt.fr/)</span> is a
-disk encryption software that works on Windows, macOS, and Linux.
+disk encryption tool that works on Windows, macOS, and Linux.
 
 Comparison between <span class="application">LUKS</span> and <span class="application">VeraCrypt</span>
 -------------------------------------------------------------------------------------------------------