gopls/doc: fix it's/its typo

Change-Id: If8eecf41ae6d83bf4228e818aa1ef9ee3267db58
GitHub-Last-Rev: 73153ddfb8c86a145eef79997b18a5cdef21b8bf
GitHub-Pull-Request: golang/tools#197
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214858
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/gopls/doc/settings.md b/gopls/doc/settings.md
index 4e99a19..e767f77 100644
--- a/gopls/doc/settings.md
+++ b/gopls/doc/settings.md
@@ -52,7 +52,7 @@
 It might be one of:
 * `"godoc.org"`   
 * `"pkg.go.dev"`
-If company chooses to use its own `godoc.org`, it's address can be used as well.
+If company chooses to use its own `godoc.org`, its address can be used as well.
 
 Default: `"pkg.go.dev"`.