Use Blacksmith runners for workflows

Author: kriptoburak

.github/workflows/context7-refresh.yml

@@ -18,7 +18,7 @@ permissions: {}
 
 jobs:
   refresh:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     steps:
       - name: Trigger Context7 refresh
         env:

.github/workflows/publish-mcp-registry.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   publish:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     permissions:
       contents: read
     env:

.github/workflows/publish.yml

@@ -13,7 +13,7 @@ on:
 
 jobs:
   publish:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     permissions:
       contents: write
       id-token: write