Run a spellchecker on src/docs/

I'd also like to use this CL as a test for
crbug.com/1257744

Change-Id: Ie958c515680a2a130c257c23f826d5a30a3963ac
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3229977
Commit-Queue: Quinten Yearsley <[email protected]>
Reviewed-by: Andrii Shyshkalov <[email protected]>
Cr-Commit-Position: refs/heads/main@{#933514}
diff --git a/docs/documentation_best_practices.md b/docs/documentation_best_practices.md
index 623e18b..b8c9e954 100644
--- a/docs/documentation_best_practices.md
+++ b/docs/documentation_best_practices.md
@@ -93,7 +93,7 @@
     * Who maintains this directory and where I can learn more?
 
 4.  **Design docs, PRDs**: A good design doc or PRD discusses the proposed
-    implementation at length for the purpose of collecting feeback on that
+    implementation at length for the purpose of collecting feedback on that
     design. However, once the code is implemented, design docs should serve as
     archives of these decisions, not as half-correct docs (they are often
     misused). See