update other entry HTML files

Ran `make gen_other_html` to perform the above.

2015/burton/road.to.obscurity.html

@@ -334,6 +334,8 @@ decipher the logic. Many times in the debugging, I was thwarted by my own
 obfuscations, and went down blind paths in trying to fix a bug or add
 functionality. Now I think I have a good entry.</p>
 <p>But wouldn’t it be nice to import pre-set definitions from a file?</p>
+<hr style="width:10%;text-align:left;margin-left:0">
+<p>Jump to: <a href="#">top</a></p>
 <!--
 
     Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.

2015/burton/spoilers.html

@@ -164,6 +164,8 @@ decomposition was mostly chosen to avoid curly braces: if a <code>for</code>-loo
 multiple statements, the body became a new function. Last, but not least:
 sharing state via global variables is an ancient and honored form of
 obfuscation, and remarkably effective.</p>
+<hr style="width:10%;text-align:left;margin-left:0">
+<p>Jump to: <a href="#">top</a></p>
 <!--
 
     Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.