CP013: Move WIP affinity paper to next revision.

* Update summary page with link to recent publication.
* Rename current document to d0796r2.md.

Author: Gordon Brown

affinity/cpp-20/d0796r1.md renamed to affinity/cpp-20/d0796r2.md

@@ -20,6 +20,8 @@ This paper provides an initial meta-framework for the drives toward memory affin
 | Version | Status |
 |---------|--------|
 | [P0796r0][p0796r0] | _Published_ |
-| [D0796r1](cpp-20/d0796r1.md) | _Work In Progress_ |
+| [P0796r1][p0796r1] | _Published_ |
+| [D0796r2](cpp-20/d0796r2.md) | _Work In Progress_ |
 
-[p0796r0]: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0796r0.pdf
+[p0796r0]: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0796r0.pdf
+[p0796r1]: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0796r1.pdf