Fix image source and add alt text in conclusion

Updated image source path and added alt text for accessibility.

Author: lodowicke

chapters/conclusion.md

@@ -7,8 +7,7 @@ title: Conclusion
 
 This is where we reach our conclusions.
 
-<img src="test_page_structure/images/Siege_of_La_Rochelle_1881_Henri_Motte.png">
-![THe siege of la rochelle saw the end of widespread huegenot resistance in france. also richelieu was there](test_page_structure/images/Siege_of_La_Rochelle_1881_Henri_Motte.png)
+<img src="/images/Siege_of_La_Rochelle_1881_Henri_Motte.png" alt="The Siege of La Rochelle" width="480" height="273">
 
 
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