[CI] do all install steps at once

.gitea/workflows/build.yml

@@ -20,8 +20,7 @@ jobs:
             python3 \
             python3-pip \
             jq
-      - name: Install yaml2json
+          python3 -m pip install remarshal
-        run: python3 -m pip install remarshal
       - id: set-matrix
         name: Fetch Build Matrix
         run: |
@@ -38,6 +37,11 @@ jobs:
       fail-fast: false
       matrix: ${{fromJson(needs.matrix.outputs.matrix)}}
     steps:
+      - name: Install dependencies
+        run: |
+          apt-get update
+          apt-get install --yes --no-install-recommends \
+            nodejs
       - name: Prepare variables
         id: variables
         run: |