Fix run-tests-with-beam when OTP <= 23

Pre-OTP 24 containers are built with Debian Buster.
Use archive.debian.org mirror.

Signed-off-by: Davide Bettio <davide@uninstall.it>

Author: bettio

.github/workflows/run-tests-with-beam.yaml

@@ -43,14 +43,17 @@ jobs:
         - os: "ubuntu-24.04"
           test_erlang_opts: "-s prime_smp"
           container: erlang:21
+          archive: "true"
 
         - os: "ubuntu-24.04"
           test_erlang_opts: "-s prime_smp"
           container: erlang:22
+          archive: "true"
 
         - os: "ubuntu-24.04"
           test_erlang_opts: "-s prime_smp"
           container: erlang:23
+          archive: "true"
 
         - os: "ubuntu-24.04"
           test_erlang_opts: "-s prime_smp"
@@ -89,6 +92,11 @@ jobs:
       with:
         submodules: 'recursive'
 
+    - name: "Switch to archive.debian.org"
+      if: matrix.archive == 'true'
+      run: |
+        sed -i 's|deb\.debian\.org|archive.debian.org/debian-archive|g' /etc/apt/sources.list
+
     - name: "Install deps (container)"
       if: runner.os == 'Linux'
       run: |