Inject tmate

Author: DavisVaughan

.github/workflows/R-CMD-check.yaml

@@ -53,6 +53,10 @@ jobs:
           http-user-agent: ${{ matrix.config.http-user-agent }}
           use-public-rspm: true
 
+      - name: Setup tmate session
+        uses: mxschmitt/action-tmate@v3
+        timeout-minutes: 60
+
       - name : Install compiler version
         if: matrix.config.custom == 'gcc 4.8'
         run: |