ALL: change kms-api dependency range to the current release version
ALL: change kms-api dependency range to the current release version

This prevents language-specific tools from allowing a too wide range of
compatible versions.

Specifically, Maven will attempt to access ALL versions in the range,
which meant that it would download manifests of all artifacts since
6.7.0.

kms-omni-build/bin/set-versions.sh has been updated too, so future
releases will have this range automatically updated to the newest
release version.

Fixes https://groups.google.com/g/kurento/c/7B5k_cZ2Ya0/

Kurento/kms-elements,Kurento/kms-elements,Kurento/kms-elements