Public downloads: the installer and the updater come from Gitea releases, no token

REQUIRE_SIGNIN_VIEW is off and mitchell/hamlab is public, so anyone can clone it or pull
a release. The other five repos are individually private and 404 to anonymous. Gitea
resolves releases/download/latest/<asset>, so the install one-liner and HAMLAB_URL point
at the newest release and never need changing.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

install.sh

@@ -15,6 +15,8 @@
 #   ./install.sh                 # beside the hamlab-linux-* files: installs offline
 #
 #   HAMLAB_URL       where hamlab-linux-<arch>, SHA256SUMS and VERSION are served from —
+#                    by default the newest release on Gitea; "latest" is an alias Gitea
+#                    resolves to the most recent release, so the URL never needs changing —
 #                    any static file host, or a Gitea/Forgejo release's download URL
 #   HAMLAB_TOKEN     access token, when that place is a private Gitea/Forgejo repo
 #   NO_COLOR         plain output
@@ -22,7 +24,7 @@
 # POSIX sh: runs under dash, busybox ash and bash alike.
 set -eu
 
-HAMLAB_URL="${HAMLAB_URL:-https://hamlab-demo.bigham.dev/dl}"
+HAMLAB_URL="${HAMLAB_URL:-https://git.bigham.dev/mitchell/hamlab/releases/download/latest}"
 BUILT_FOR="@VERSION@" # filled in by `make release`
 
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