Reword introduction of public keys

Move the sentence about the Ubuntu public key server into the intro
paragraph.

Mention that the keys are used to sign announcement emails.

Change-Id: I859b6797a07a54b097254649771a28891fe53602
1 file changed
tree: 8b13c3e9f1f9eafac2c621d499c265950b483b7f
  1. docs/
  2. images/
  3. releases/
  4. about.md
  5. COPYING
  6. index.md
  7. issues.md
  8. navbar.md
  9. README.md
README.md

Homepage for Gerrit Code Review.