GHA: fix runs-on labels for ARM64 self-hosted runners

Signed-off-by: Mikhail Malyshev <mike.malyshev@gmail.com>

Author: rucoder

.github/workflows/pr-build.yml

@@ -13,7 +13,7 @@ concurrency:
 
 jobs:
     build:
-        runs-on: self-hosted
+        runs-on: [runner-xl, Linux]
 
         steps:
             - name: Set sanitized branch name

.github/workflows/publish.yml

@@ -11,7 +11,7 @@ concurrency:
 
 jobs:
     build:
-        runs-on: self-hosted
+        runs-on: [runner-xl, Linux]
 
         steps:
             - name: Checkout code