message: fix URL example in manual
  fixes
diff: @@ -99,7 +99,7 @@ fn rage_page() {
  .text("Encryption to a list of recipients at an HTTPS URL")
  .command(
  "echo \"_o/\" | rage -o hello.age \
  - -r https://filippo.io/.well-known/age.keys > hello.age",
  + -r https://github.com/str4d.keys > hello.age",
  ),
  )
  .example(
  