Merge bitcoin/bitcoin#24367: User-facing content and codebase doc fixups from transifex translator feedback

48742693ac Replace "can not" with "cannot" in docs, user messages, and tests (Jon Atack)
e670edd434 User-facing content fixups from transifex translator feedback (Jon Atack)

Pull request description:

  Closes #24366.

ACKs for top commit:
  laanwj:
    Code review re-ACK 48742693ac
  hebasto:
    re-ACK 48742693ac, only suggested change since my previous [review](https://github.com/bitcoin/bitcoin/pull/24367#pullrequestreview-885938219).

Tree-SHA512: 4dcdcb417251a413e65fab6070515e13a1267c8e0dbcf521386b842511391f24c84a0c2168fe13458c977682034466509bf2a3453719d4d94d3c568fd9f4adb4

contrib/guix/guix-build

@@ -192,7 +192,7 @@ fi
 
 if ! getent services http https ftp > /dev/null 2>&1; then
 cat << EOF
-ERR: Your system's C library can not find service database entries for at least
+ERR: Your system's C library cannot find service database entries for at least
      one of the following services: http, https, ftp.
 
 Hint: Most likely, /etc/services does not exist yet (common for docker images