docs/SUMMARY: add firmware images

Signed-off-by: Daniel Maslowski <[email protected]>

Author: orangecms

docs/SUMMARY.md

@@ -2,4 +2,4 @@
     - [Architecture and Design](architecture.md)
 - [Intel platforms](platforms.md)
     - [Knowledge on Firmware Images](knowledge.md)
-
+    - [Obtaining firmware images](images.md)