update regression_test.yml

fix github guix regression test action issue

update regression_test.yml

uses: azure-rtos/threadx/.github/workflows/regression_template.yml@master
==>
uses: eclipse-threadx/threadx/.github/workflows/regression_template.yml@master

Author: ayedm1

.github/workflows/regression_test.yml

@@ -23,7 +23,7 @@ jobs:
       pages: write
       id-token: write
 
-    uses: azure-rtos/threadx/.github/workflows/regression_template.yml@master
+    uses: eclipse-threadx/threadx/.github/workflows/regression_template.yml@master
     with:
       cmake_path: ./test/guix_test/cmake
       result_affix: GUIX