Update file engineering.html

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@@ -490,9 +490,9 @@ iii. The OMVs cross-linking efficiency is lower than we expected. Though it is l
 
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-        <p><a href="#1" class="ltitle">Cycle 1 Pb(II)-binding module construction</a></p>
+        <p><a href="#1" class="ltitle">Cycle 1: Pb(II)-binding module construction</a></p>
         <p><a href="#2" class="ltitle">Cycle 2: OMV recovery module, Lpp’OmpA-His10</a></p>
-        <p><a href="#3" class="ltitle">Cycle 3 Improved Pb(II)-binding module</a></p>
+        <p><a href="#3" class="ltitle">Cycle 3: Improved Pb(II)-binding module</a></p>
         <p><a href="#4" class="ltitle">Cycle 4: Cross-linking module, Lpp’OmpA-SpyTag/SpyCatcher</a></p>
         <p><a href="#5" class="ltitle">Proposed implementation</a></p>