try pip under sudo

Author: patapenka-alexey

.github/workflows/testing.yml

@@ -89,7 +89,7 @@ jobs:
       - name: Setup Tarantool master
         if: matrix.tarantool == 'master' && steps.cache-latest.outputs.cache-hit != 'true'
         run: |
-          sudo apt install cmake=3.15.3
+          sudo pip3 install cmake==3.15.3
           sudo tt install tarantool master
 
       - name: Add Tarantool master to PATH