ci: use larger runners and main for Arc public builds

.github/workflows/build.yml

@@ -3,9 +3,9 @@ name: build
 # Same-repository PRs publish SHA-tagged images for review; releases use release.yml.
 on:
   pull_request:
-    branches: [main, debank]
+    branches: [main]
   push:
-    branches: [main, debank]
+    branches: [main]
   workflow_dispatch:
 
 concurrency:
@@ -32,9 +32,9 @@ jobs:
         component: [execution, consensus]
         include:
           - arch: amd64
-            runner: ubuntu-latest
+            runner: ubuntu2404-linux-x86-64-16c
           - arch: arm64
-            runner: ubuntu-24.04-arm
+            runner: ubuntu2204-arm64-16c
           - component: execution
             image_name: arc-node
           - component: consensus

.github/workflows/release.yml

@@ -29,9 +29,9 @@ jobs:
         component: [execution, consensus]
         include:
           - arch: amd64
-            runner: ubuntu-latest
+            runner: ubuntu2404-linux-x86-64-16c
           - arch: arm64
-            runner: ubuntu-24.04-arm
+            runner: ubuntu2204-arm64-16c
           - component: execution
             image_name: arc-node
           - component: consensus

CONTRIBUTING.md

@@ -36,7 +36,7 @@ Requirements:
 ### Development Workflow
 
 1. Fork the repository
-2. Create a branch from `debank`
+2. Create a branch from `main`
 3. Make changes, focused on the pipeline layer
 4. Run local checks
 5. Open a PR

SECURITY.md

@@ -28,11 +28,11 @@ on an unmodified upstream build?
 
 ### Supported Versions
 
-We provide security updates for the latest `debank` branch and recent releases.
+We provide security updates for the latest `main` branch and recent releases.
 
 | Version | Supported |
 |---------|----------|
-| debank  | Yes      |
+| main    | Yes      |
 | Latest release | Yes |
 | older versions   | No |