try customizing branch name with github vars

Author: kb-kerem

.github/workflows/dotnet.yml

@@ -39,7 +39,7 @@ jobs:
             "dotenv=${{ secrets.DOTENV }}"
           build-args: |
             GITHUB_RUN_ID=${{ github.run_id }}
-            GITHUB_RUN_ATTEMPT=${{ github.run_attempt }}
+            GITHUB_RUN_NUMBER=${{ github.run_number }}
 
   nunit:
     runs-on: ubuntu-latest

dotnet-nunit/Dockerfile

@@ -22,8 +22,8 @@ WORKDIR /workspace
 COPY . .
 
 ARG GITHUB_RUN_ID
-ARG GITHUB_RUN_ATTEMPT
-ARG SAUCE_VISUAL_BRANCH_NAME=${GITHUB_RUN_ID}${GITHUB_RUN_ATTEMPT}
+ARG GITHUB_RUN_NUMBER
+ARG SAUCE_VISUAL_BRANCH_NAME=${GITHUB_RUN_ID}${GITHUB_RUN_NUMBER}
 
 RUN --mount=type=secret,id=dotenv,target=/workspace/.env env $(cat /workspace/.env | xargs) runme run dotnet-test
 RUN --mount=type=secret,id=dotenv,target=/workspace/.env env $(cat /workspace/.env | xargs) runme run dotnet-test-modified