spelling: mixed-case

Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>

diff --git a/regression-tests/tests/1dyndns-content-casemix/command b/regression-tests/tests/1dyndns-content-mixed-case/command
similarity index 100%
rename from regression-tests/tests/1dyndns-content-casemix/command
rename to regression-tests/tests/1dyndns-content-mixed-case/command

diff --git a/regression-tests/tests/1dyndns-content-casemix/description b/regression-tests/tests/1dyndns-content-mixed-case/description
similarity index 100%
rename from regression-tests/tests/1dyndns-content-casemix/description
rename to regression-tests/tests/1dyndns-content-mixed-case/description

diff --git a/regression-tests/tests/1dyndns-content-casemix/expected_result b/regression-tests/tests/1dyndns-content-mixed-case/expected_result
similarity index 100%
rename from regression-tests/tests/1dyndns-content-casemix/expected_result
rename to regression-tests/tests/1dyndns-content-mixed-case/expected_result

diff --git a/regression-tests/tests/1dyndns-content-casemix/skip.nodyndns b/regression-tests/tests/1dyndns-content-mixed-case/skip.nodyndns
similarity index 100%
rename from regression-tests/tests/1dyndns-content-casemix/skip.nodyndns
rename to regression-tests/tests/1dyndns-content-mixed-case/skip.nodyndns