Update benchmarks comment on the PR

[camposandro]

It updates the existing benchmarks comment, written by the GitHub Actions bot on the pull request, instead of creating a new one each time code is pushed to the active branch. It also pulls the latest template version (v1.4.3).

[github-actions]

Before	After	Ratio	Method
[8ff9456]	[842649d]
480	3.81k	7.93	benchmarks.MemSuite.mem_list
788±1000ms	2.32±0.9s	~2.94	benchmarks.TimeSuite.time_iterkeys
1.98±0.7s	1.97±1s	1.00	benchmarks.TimeSuite.time_keys
3.10±0.8s	2.65±1s	~0.85	benchmarks.TimeSuite.time_range
3.36±2s	1.80±1s	~0.54	benchmarks.TimeSuite.time_xrange

Click here to view all benchmarks.