Use arm runners for common CI

Author: mrdimidium

.github/workflows/check.yml

@@ -11,7 +11,7 @@ permissions:
 jobs:
   check:
     name: "Test & Release"
-    runs-on: blacksmith-2vcpu-ubuntu-2404
+    runs-on: blacksmith-2vcpu-ubuntu-2404-arm  # arm is half the price
     steps:
     - uses: actions/checkout@v5
 

.github/workflows/library.yml

@@ -6,7 +6,7 @@ on:
 jobs:
   lint:
     name: Runs static checks
-    runs-on: blacksmith-2vcpu-ubuntu-2404-arm  # arm is cheaper than x64
+    runs-on: blacksmith-2vcpu-ubuntu-2404-arm  # arm is half the price
     steps:
     - uses: actions/checkout@v5
     - uses: mlugg/setup-zig@v2

.github/workflows/overseer.yml

@@ -12,7 +12,7 @@ permissions:
 
 jobs:
   overseer:
-    runs-on: blacksmith-2vcpu-ubuntu-2404
+    runs-on: blacksmith-2vcpu-ubuntu-2404-arm  # arm is half the price
     steps:
     - uses: actions/checkout@v5
     - uses: astral-sh/setup-uv@v7

.github/workflows/release.yml

@@ -11,7 +11,7 @@ jobs:
 
   # Converting a git tag into a stub of an immutable release
   release:
-    runs-on: blacksmith-2vcpu-ubuntu-2404
+    runs-on: blacksmith-2vcpu-ubuntu-2404-arm  # arm is half the price
     needs: [build]
     permissions:
       contents: write  # for releases API