Update endurance.yml

Author: JohnSully

.github/workflows/endurance.yml

@@ -17,6 +17,6 @@ jobs:
           make -j8
     - name: test-multithread (5X)
       run: |
-        sudo apt-get install tcl8.5
+        sudo apt-get install -y tcl8.5
         ./runtest --loopn 5 --config server-threads 3 --clients 3