build: Use standard SPDX license name for Apache License
build: Use standard SPDX license name for Apache License

See https://spdx.org/licenses/Apache-2.0.html.

Signed-off-by: BJ Hargrave <79c2611307ec26eadfef14d3896a4f8c046a371e@us.ibm.com>

microprofile/microprofile-config