Run ARM jobs on ARM runners

Signed-off-by: DL6ER <dl6er@dl6er.de>

Author: DL6ER

.github/workflows/ftl-build.yml

@@ -30,17 +30,23 @@ jobs:
     if: |
       (github.event_name == 'push' && github.repository == 'pi-hole/docker-base-images') ||
       (github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name != github.repository)
-    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
         include:
           - platform: linux/amd64
+            runner: ubuntu-latest
           - platform: linux/386
+            runner: ubuntu-latest
           - platform: linux/arm/v6
+            runner: ubuntu-latest-arm64
           - platform: linux/arm/v7
+            runner: ubuntu-latest-arm64
           - platform: linux/arm64/v8
+            runner: ubuntu-latest-arm64
           - platform: linux/riscv64
+            runner: ubuntu-latest
+    runs-on: ${{ matrix.runner }}
     steps:
       -
         name: Prepare name for digest up/download