MAINTAINERS: thermal: samsung: update Krzysztof Kozlowski's email

Use Krzysztof Kozlowski's @kernel.org account in dt-bindings maintainer
entry.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20220308065648.6443-1-krzysztof.kozlowski@canonical.com


Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>