Plenary test frequently fails for no reason

[cseickel]

Just re-running it will often make it pass:

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Scheduling: tests/neo-tree/command/command_spec.lua

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Testing: 	/home/runner/work/neo-tree.nvim/neo-tree.nvim/tests/neo-tree/sources/filesystem/filesystem_netrw_hijack_spec.lua	
Success	||	Filesystem netrw hijack does not interfere with netrw when disabled	
Success	||	Filesystem netrw hijack opens in sidebar when behavior is open_default	
Fail	||	Filesystem netrw hijack opens in in splits when behavior is open_current	
            ./tests/utils/verify.lua:9: neotree is not in the second window
            
            stack traceback:
            	./tests/utils/verify.lua:9: in function 'eventually'
            	...tree/sources/filesystem/filesystem_netrw_hijack_spec.lua:[85](https://github.com/nvim-neo-tree/neo-tree.nvim/actions/runs/6833611353/job/18585549389?pr=1221#step:6:86): in function <...tree/sources/filesystem/filesystem_netrw_hijack_spec.lua:64>
            	
	
Success: 	2	
Failed : 	1	
Errors : 	0	
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Tests Failed. Exit: 1	
Scheduling: tests/neo-tree/command/command_current_spec.lua
Already only one windowAlready only one window