Run on the halogen label: the yukart runner is not Android-only

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DDwfd6Ki8UfG4hK6W5YpJz

.gitea/workflows/crosscheck.yml

@@ -16,8 +16,8 @@ on:
 
 jobs:
   crosscheck:
-    # The yukart org's runner on halogen (host mode). Needs only git, curl and python3.
-    runs-on: flutter-android
+    # halogen-yukart, the org's runner on halogen (host mode). Needs only git, curl and python3.
+    runs-on: halogen
     steps:
       - name: Clone every yukart repo
         env:

.gitea/workflows/self-check.yml

@@ -9,7 +9,7 @@ jobs:
   crosscheck:
     # Gitea dispatches a reusable-workflow call to a runner chosen by the CALLER's runs-on;
     # without one, any runner may take it (the instance's pi5-runner did, and failed).
-    runs-on: flutter-android
+    runs-on: halogen
     uses: yukart/tool-crosscheck/.gitea/workflows/crosscheck.yml@master
     with:
       repo: ${{ github.event.repository.name }}

README.md

@@ -37,7 +37,7 @@ fails that push's run: the commit that made two repos disagree is the one marked
 A new repo is checked as soon as it exists in the org; it needs the caller only to
 trigger checks on its own pushes.
 
-- ⚠ **The caller must say `runs-on: flutter-android`.** Gitea hands a reusable-workflow
+- ⚠ **The caller must say `runs-on: halogen`** (the yukart org's runner, `halogen-yukart`). Gitea hands a reusable-workflow
   call to a runner chosen by the *caller's* `runs-on`; the called workflow's own is not
   consulted for that. Without it, the instance-wide `pi5-runner` on the Gitea host takes
   the job, and its jobs see the server as `http://gitea:3000`, which does not resolve.

caller/crosscheck.yml

@@ -9,7 +9,7 @@ jobs:
   crosscheck:
     # Gitea dispatches a reusable-workflow call to a runner chosen by the CALLER's runs-on;
     # without one, any runner may take it (the instance's pi5-runner did, and failed).
-    runs-on: flutter-android
+    runs-on: halogen
     uses: yukart/tool-crosscheck/.gitea/workflows/crosscheck.yml@master
     with:
       repo: ${{ github.event.repository.name }}