CMake Nightly Date Stamp
Tests: Adjust expected error message in FailedSubmit-ftp

Error message from cygwin's curl (using `--system-libs`) in
CTestTestFailedSubmit-ftp was:

  Failed to connect to  port 21: Connection timed out
        ^^^

Update our regex to match this.
Merge topic 'fix-test-FailedSubmit-match' into next

e0acdd1a Tests: Adjust expected error message in FailedSubmit-ftp
93da76d4 CMake Nightly Date Stamp