chore: fix some typos in markdown file (jdx#4198)

Signed-off-by: chuangjinglu <[email protected]>

Author: chuangjinglu

docs/contributing.md

@@ -3,7 +3,7 @@
 Before submitting a PR, unless it's something obvious, consider filing an issue or simply mention what you plan to do in the [Discord](https://discord.gg/UBa7pJUN7Z).
 PRs are often either rejected or need to change significantly after submission so make sure before you start working on something it won't be a wasted effort.
 
-Issues ideal for contributors can be found with the ["help wanted"](https://github.com/jdx/mise/issues?q=is%3Aissue+is%3Aopen+label%3A%22help+wanted%22) and ["good first issue"](https://github.com/jdx/mise/labels/good%20first%20issue) labels. These are isssues that I feel are self-contained therefore don't require super in-depth understanding of the codebase or that require knowledge about something I don't understand very well myself.
+Issues ideal for contributors can be found with the ["help wanted"](https://github.com/jdx/mise/issues?q=is%3Aissue+is%3Aopen+label%3A%22help+wanted%22) and ["good first issue"](https://github.com/jdx/mise/labels/good%20first%20issue) labels. These are issues that I feel are self-contained therefore don't require super in-depth understanding of the codebase or that require knowledge about something I don't understand very well myself.
 
 ## Testing
 

docs/tasks/task-configuration.md

@@ -26,7 +26,7 @@ run = ["echo hello"]
 
 ### `run_windows`
 
-An alterative script to run when `mise run` is executed on windows:
+An alternative script to run when `mise run` is executed on windows:
 
 ```toml
 [tasks.build]

docs/tips-and-tricks.md

@@ -62,7 +62,7 @@ the version of mise that was current when the script was created.
 
 ## Installation via zsh zinit
 
-[Zinit](https://github.com/zdharma-continuum/zinit) is a plugin manager for ZSH, wich this snippet you will get mise (and usage for shell completion):
+[Zinit](https://github.com/zdharma-continuum/zinit) is a plugin manager for ZSH, which this snippet you will get mise (and usage for shell completion):
 
 ```sh
 zinit as="command" lucid from="gh-r" for \