fix: standardize cross-reference link text for Pattern 10 subsection

patterns/documentation.md

@@ -215,7 +215,7 @@ def chunk(list, size), do: ...
 **Don't use this when:**
 - The function is private (use `# comments` for private function notes)
 - The function name + typespec are completely self-explanatory (e.g., `@spec pid() :: pid()`)
-- You're implementing a behaviour callback — `@impl true` sets `@doc false` automatically. Override only when the implementation has semantics the behaviour can't speak to (see [Pattern 10](#when-to-override-doc-false-on-impl-functions))
+- You're implementing a behaviour callback — `@impl true` sets `@doc false` automatically. Override only when the implementation has semantics the behaviour can't speak to (see [Pattern 10 — implementation-side docs](#when-to-override-doc-false-on-impl-functions))
 
 **Over-application example:**
 ```elixir