Add backlinks to new issues addressing NB comments

Author: jwakely

xml/issue4432.xml

@@ -11,7 +11,7 @@
 <priority>99</priority>
 
 <discussion>
-<b>Addresses US 120-181 and US 121-182</b>
+<b>Addresses <a href="https://github.com/cplusplus/nbballot/issues/750">US 120-181</a> and <a href="https://github.com/cplusplus/nbballot/issues/751">US 121-182</a></b>
 <p>
 <sref ref="[meta.reflection.array]"/> p10 Clarify <i>e<sub>i</sub></i> type.
 It is not clear what <i>e<sub>i</sub></i> is when proxy references are involved.

xml/issue4433.xml

@@ -11,7 +11,7 @@
 <priority>99</priority>
 
 <discussion>
-<b>Addresses US 97-203</b>
+<b>Addresses US <a href="https://github.com/cplusplus/nbballot/issues/772">97-203</a></b>
 <p>
 <sref ref="[meta.reflection.queries]"/>
 Language linkage is a property of functions, variables, and function types (<sref ref="[basic.link]"/>),