docs: point the README's forge links at git.d-ma.be (#94)

The three forge links in README.md used http://gitea.d-ma.be, an alias
whose ingress was removed by infra#126. Verified rather than assumed: DNS
still resolves the name to the same IP, but a public repo returns 404
there and 200 on git.d-ma.be, with no redirect — so the links are broken,
not merely old.

Scope is README.md only. The dated files under docs/superpowers/plans and
specs are records of what was done in April/May 2026, when that hostname
was correct; rewriting them would falsify the record rather than fix a
link.

Note the agentsquad link still 404s unauthenticated — that repo is
private, which is expected and not a URL problem.

Refs #94, infra#126.

README.md

@@ -25,7 +25,7 @@ usage, the fast-model routing path should be reconsidered.
 
 **hyperguild = Claude Code + MCP.** This is a supervisor for Claude Code sessions specifically.
 For multi-agent orchestration (OpenCode + LiteLLM, executor/reviewer pipelines), see
-[agentsquad](http://gitea.d-ma.be/mathias/agentsquad) — a separate harness for a different
+[agentsquad](https://git.d-ma.be/mathias/agentsquad) — a separate harness for a different
 orchestration model. Skills (mathias/skills) are shared between both.
 
 ## How it works
@@ -90,7 +90,7 @@ Full reasoning, including the reversal trigger: brain
 | `tier` | Returns the current connectivity tier (1=cloud, 2=LAN, 3=offline) |
 
 > **Note:** `tdd_red/green/refactor` and `spec` were retired in Plan 7 (2026-05-12).
-> They are now SKILL.md files in [mathias/skills](http://gitea.d-ma.be/mathias/skills).
+> They are now SKILL.md files in [mathias/skills](https://git.d-ma.be/mathias/skills).
 
 ## Connect a project
 
@@ -179,7 +179,7 @@ The routing pod selects models per skill call based on historical pass rate:
 
 ## Open issues
 
-See [issues](http://gitea.d-ma.be/mathias/hyperguild/issues) — key open items:
+See [issues](https://git.d-ma.be/mathias/hyperguild/issues) — key open items:
 
 - **#25** — skills platform overhaul (audit first, then lazy loading + brain feedback loop)
 - **#24** — reduce context burn from skill listing