docs: Minor - add "code relocation" link to "Execution and code flow" document

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
diff --git a/docs/Execution_and_code_flow.md b/docs/Execution_and_code_flow.md
index 9396eca..a54776e 100644
--- a/docs/Execution_and_code_flow.md
+++ b/docs/Execution_and_code_flow.md
@@ -36,7 +36,7 @@
 
 The POST phase itself has several sub-phases.
 
-* The "preinit" sub-phase: code run prior to code relocation.
+* The "preinit" sub-phase: code run prior to [code relocation](Linking overview#Code relocation).
 * The "init" sub-phase: code to initialize internal variables and
   interfaces.
 * The "setup" sub-phase: code to setup hardware and drivers.