Fixup: Typo in runs-on

Author: lool

.github/workflows/build-overlay-deb.yml

@@ -21,7 +21,7 @@ jobs:
       matrix:
         include:
           - arch: amd64
-            runs-on: [self-hosted, qcom-u2404, amd64]
+            runs_on: [self-hosted, qcom-u2404, amd64]
           - arch: arm64
             runs_on: [self-hosted, qcom-u2404, arm64]
     runs-on: ${{ matrix.runs_on }}