[BUGFIX] Use full url to the distribution images in XML file
How to test:
- Make a distribution image available on your local setup by copying e.g. https://extensions.typo3.org/fileadmin/ter/a/i/aimeos_dist_19.4.0_Distribution.png to the local fileadmin location
- Run
ddev typo3cms ter:createExtensionIndexXml
- Unzip the generated file with
gzip -d private/fileadmin/ter/extensions.xml.gz
- Look into the file and look for a full url in the field
distributionImage