chore: Update test results badge path in dotnetcore.yml workflow

.github/workflows/dotnetcore.yml

@@ -59,15 +59,17 @@ jobs:
       if: "!contains(github.event.head_commit.message, '[skip ci]')"
       shell: bash
       run: |
-        curl -o tests-badge.svg "https://img.shields.io/badge/tests-${{ steps.parse.outputs.total }}%20%2F%20${{ steps.parse.outputs.passed }}-green"
+        curl -o tests-badge.svg "https://img.shields.io/badge/tests-$passed%2F$total-green"
     - name: Commit badge
+      shell: bash
       if: "!contains(github.event.head_commit.message, '[skip ci]')"
       run: |
         git config --global user.name "github-actions"
         git config --global user.email "github-actions@github.com"
-        rm ./badges/tests-badge.svg
+        mkdir -p badges
+        rm -f badges/tests-badge.svg
         mv tests-badge.svg badges/tests-badge.svg
-        git add badges/tests-badge.svg
+        git add badges/tests-badge.svg README.md
         git commit -m "Update test results badge [skip ci]"
         git push
     - name: Publish