ci: fix old otp vsn for relup test

.github/workflows/run_fvt_tests.yaml

@@ -317,8 +317,10 @@ jobs:
           fail-fast: false
           matrix:
             old_vsn: ${{ fromJson(needs.relup_test_plan.outputs.matrix) }}
+            old_otp:
+              - 24.1.5-3
             otp:
-            - 24.3.4.2-1
+              - 24.3.4.2-1
         env:
           OLD_VSN: "${{ matrix.old_vsn }}"
           PROFILE: "${{ needs.relup_test_plan.outputs.profile }}"
@@ -345,7 +347,7 @@ jobs:
             mkdir -p packages
             cp emqx_built/_packages/*/*.zip packages
             cd packages
-            wget --no-verbose https://s3-us-west-2.amazonaws.com/packages.emqx/$BROKER/$OLD_VSN/$PROFILE-${OLD_VSN#[e|v]}-otp${{ matrix.otp }}-ubuntu20.04-amd64.zip
+            wget --no-verbose https://s3-us-west-2.amazonaws.com/packages.emqx/$BROKER/$OLD_VSN/$PROFILE-${OLD_VSN#[e|v]}-otp${{ matrix.old_otp }}-ubuntu20.04-amd64.zip
         - name: Run relup test scenario
           timeout-minutes: 5
           run: |
@@ -357,8 +359,8 @@ jobs:
             --var ONE_MORE_EMQX_PATH=$(pwd)/one_more_emqx \
             --var VSN="$VSN" \
             --var OLD_VSN="$OLD_VSN" \
-            --var FROM_OTP_VSN="24.3.4.2-1" \
-            --var TO_OTP_VSN="24.3.4.2-1" \
+            --var FROM_OTP_VSN="${{ matrix.old_otp }}" \
+            --var TO_OTP_VSN="${{ matrix.otp }}" \
             emqx_built/.ci/fvt_tests/relup.lux
         - uses: actions/upload-artifact@v2
           name: Save debug data