Update instructions for bor v0.2.4

[SwaroopH]

Current instructions fail for v0.2.1

fatal: [3.237.99.90]: FAILED! => {"changed": true, "cmd": ["make", "bor-all"], "delta": "0:00:00.002944", "end": "2021-01-27 16:13:48.672532", "msg": "non-zero return code", "rc": 2, "start": "2021-01-27 16:13:48.669588", "stderr": "make: *** No rule to make target 'bor-all'. Stop.", "stderr_lines": ["make: *** No rule to make target 'bor-all'. Stop."], "stdout": "", "stdout_lines": []}