Bugfix: use "-" instead of "." in snippets

[EmilyGraceSeville7cf]

Addresses this comment.

@Shane-XB-Qian

[Shane-XB-Qian]

thx, this looks good.

// though lsp client to recognize [[ ]] may still had issues, but that maybe not a problem from this.

[Shane-XB-Qian]

well, looks i found the reason, though i am not sure which the real one caused it.
but for example if-else-test, you set 'if [[ $${1:variable} ${2|-ef,-nt,-ot,==,=~,!=,<,>,-lt,-le,-gt,-ge|} $${3:variable} ]]; then',
those two $$ maybe convenience in some cases, but to shell or to snip plugin, $ is a special meaning char....

so if you can or make it be simple,
i wish you could remove that double $$, but just one $,
user can manually input the $ for var, Besides that actually Not always a var but a const string/number etc.

[EmilyGraceSeville7cf]

Thanks for feedback. Gonna fix this issue today.