SKALE-2077 Fixed Naming

.github/workflows/dockerimagesim.yml

@@ -4,6 +4,11 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
+    - name: install python 3.7
+      run: |
+        sudo apt update; sudo apt install software-properties-common;
+        sudo add-apt-repository ppa:deadsnakes/ppa
+        sudo apt install python3.7
     - name: Login to docker
       env:
         GITHUB_TOKEN: ${{ secrets.DOCKER_SECRET }}