fix: point source links and instance fetch at this fork

Upstream references still pointed at git.macaw.me, which is unmaintained
and whose instances.json is a dead link. Repoint them at this repo:

- RefreshInstances now fetches instances.json from raw.githubusercontent
- source/version links in index.htm, about.htm, and CLI help use the
  GitHub releases tag URL
- SETUP.md/SETUP-RU.md language switch links were Gitea-absolute paths
  that 404 on GitHub; make them relative
- --add-instance message says 'main' branch, matching this repo

The fork attribution in README.md is left as-is: it credits upstream
rather than pointing at the source.

2 files changed, 3 insertions, 3 deletions

diff --git a/app/cli.go b/app/cli.go
index 0480bdb..042aabd 100755
--- a/app/cli.go
+++ b/app/cli.go
@@ -17,7 +17,7 @@ Usage:
 	- [-h|--help]		| returns this message
 Example:
 	./skunkyart -c config.json
-Copyright lost+skunk, X11. https://git.macaw.me/skunky/skunkyart/src/tag/v{{.Version}}`
+Copyright lost+skunk, X11. https://github.com/zerolabsco/skunky-art/releases/tag/v{{.Version}}`
 
 	a := os.Args[1:]
 	for n, x := range a {
@@ -162,5 +162,5 @@ func addInstance() {
 		}
 		time.Sleep(500 * time.Millisecond)
 	}
-	exit("Done! Now add the files 'instances.json' and 'INSTANCES.md' to the 'master' branch in the repository https://git.macaw.me/skunky/SkunkyArt", 0)
+	exit("Done! Now add the files 'instances.json' and 'INSTANCES.md' to the 'main' branch in the repository https://github.com/zerolabsco/skunky-art", 0)
 }
diff --git a/app/util.go b/app/util.go
index 493997b..c886b29 100755
--- a/app/util.go
+++ b/app/util.go
@@ -47,7 +47,7 @@ func RefreshInstances() {
 	for {
 		func() {
 			defer restore()
-			instances = Download("https://git.macaw.me/skunky/SkunkyArt/raw/branch/master/instances.json").Body
+			instances = Download("https://raw.githubusercontent.com/zerolabsco/skunky-art/main/instances.json").Body
 			try(json.Unmarshal(instances, &About))
 		}()
 		time.Sleep(1 * time.Hour)