Switch CI to self-hosted runners

Author: Simon Morley

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ env:
 jobs:
   test:
     name: Test
-    runs-on: ubuntu-latest
+    runs-on: [self-hosted, linux, x64, nullrabbit]
 
     steps:
       - uses: actions/checkout@v4

.github/workflows/release.yml

@@ -9,7 +9,7 @@ on:
 jobs:
   release:
     name: Build & publish latest
-    runs-on: ubuntu-latest
+    runs-on: [self-hosted, linux, x64, nullrabbit]
     if: ${{ github.event.workflow_run.conclusion == 'success' }}
 
     permissions: