Use an SPDX identifier in example, as recommended

[rjmunro]

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The text says:

Using an SPDX identifier as the license name is recommended.

But then doesn't use one in the example. I found this confusing.

[michael-o]

I think this is wrong. the name shall remain as is. In a future version of the POM we will add something for SPDX. Therefore, I'd recommend to modify the SPDX part.

[rjmunro]

@michael-o I think it would make sense to re-write the docs when a SPDX field is added, but right now, the docs say to put SPDX into the name, but then don't actually do it.

Original SPDX suggesting PR for reference: https://github.com/apache/maven-site/pull/121

[michael-o]

@michael-o I think it would make sense to re-write the docs when a SPDX field is added, but right now, the docs say to put SPDX into the name, but then don't actually do it.

Original SPDX suggesting PR for reference: #121

I agree with you, this is confusing.