chore: add install for buildah

.forgejo/install_packages.sh

@@ -0,0 +1,2 @@
+sudo apt-get update -qq
+sudo apt-get -qq -y install buildah

.forgejo/workflows/build.yml

@@ -34,6 +34,10 @@ jobs:
       - name: Checkout Push to Registry action
         uses: actions/checkout@v4
 
+      - name: Install packages
+        run: |
+          bash .forgejo/install_packages.sh
+
       - name: Generate tags
         id: generate-tags
         shell: bash