[llvm] [llvm] Fix typos in documentation (PR #140275)

[Matt Arsenault via llvm-commits]

================
@@ -61,7 +61,7 @@ just a release, which looks like the following:
 However, it is best practice to specify an exact commit SHA from which to pull
 the action from, noting the version in a comment:
 
-We plan on revisting this reccomendation once Github's immutable actions have
+We plan on revising this recommendation once Github's immutable actions have
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arsenm wrote:

```suggestion
We plan on revisiting these recommendations once Github's immutable actions have
```

https://github.com/llvm/llvm-project/pull/140275