Merge pull request #3311 from asenyaev:asen/rename_jobs_5.x

Author: asmorkalov

.github/workflows/PR-5.x.yaml

@@ -6,13 +6,13 @@ on:
       - 5.x
 
 jobs:
-  ARM64:
+  Ubuntu2004-ARM64:
     uses: opencv/ci-gha-workflow/.github/workflows/OCV-Contrib-PR-5.x-ARM64.yaml@main
 
-  U20:
+  Ubuntu2004-x64:
     uses: opencv/ci-gha-workflow/.github/workflows/OCV-Contrib-PR-5.x-U20.yaml@main
 
-  W10:
+  Windows10-x64:
     uses: opencv/ci-gha-workflow/.github/workflows/OCV-Contrib-PR-5.x-W10.yaml@main
 
   macOS-ARM64: