Update glossary.md

Added image using ![ ]( ) syntax

_coffins/glossary.md

@@ -115,11 +115,9 @@ are prone to 'cup' because the wood dries and shrinks unevenly across the width
 
 The Fitzwilliam's Egyptian coffins contain examples of the following wood working joints:The Fitzwilliam's Egyptian coffins contain examples of the following wood working joints:
 
-                  <img class="align-self-center mr-3 thumb-post img-fluid"
-                     src="/images/nespawershefyt/joints_labelled.jpg"
-                     alt="Joints used in construction of Egyptian coffins in the Fitzwilliam Museum">
-
+![Joints used in construction of Egyptian coffins in the Fitzwilliam Museum](/images/nespawershefyt/joints_labelled.jpg "Joints used in construction of Egyptian coffins in the Fitzwilliam Museum")
 
+      
 ## Materials
 
 #### Cartonnage