license-compliance: Clarify that metadata is collected into .licenses files

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>

content/concepts/automated-license-compliance.md

@@ -173,7 +173,7 @@ Other packages only provide copyright information which currently is not include
    binary-to-sourcefiles mappings and
    `/usr/share/doc/$packagename/copyright_report.gz` sourcefile-to-licenses mappings
    to combine them and produce
-   [a JSON report](https://images.apertis.org/release/v2022dev2/v2022dev2.0/arm64/minimal/apertis_v2022dev2-minimal-arm64-rpi64_v2022dev2.0.img.licenses.gz)
+   [a JSON `.licenses` report](https://images.apertis.org/release/v2022dev2/v2022dev2.0/arm64/minimal/apertis_v2022dev2-minimal-arm64-rpi64_v2022dev2.0.img.licenses.gz)
    with the binary-to-licenses mapping to match each library and executable
    shipped in the image to the
    licenses of the sources used to build them