use IMO "prettier" shortcut URLs - UGNightyArchive -> UltraGridArchive
and UGAltBuilds -> UltraGridAltBuilds
While the use of CamelCase is enforced by <https://shlink.io/> UGN...
and UGA.. prefixes is harder to read so use unsortened UltraGrid,
omitting Nightly from UGNightlyArchive (with UltraGrid exceeds 20 char
limits and the Nightly isn't necessary /it is actually continuous/).
ensure URL is not empty
see also f4f54fda - adding -f to curl caused URL to be empty if release
was not found (was to be created) - the GH REST API returns 404 with
a valid body without -f but fails with empty. Since `-o pipefail` is not
used, the curl error was not used because last command of pipeline is jq.
The REST API returned 4xx on unknown object but valid JSON body. As
written originally, valid JSON was assumed (result queried on null).
So revert back the original curl calls where acquiring JSON.
This allows having some formatting in FIXES.md, eg. for different minor
versions like that:
#### 1.7.1
- changes for 1.7.1
- another fix in 1.7.1
### 1.7.2
- fixes for 1.7.2
+ join the lines like beginning with spaces more inteligently
