add changelog for #2506

CHANGELOG.md

@@ -89,6 +89,7 @@ The table below shows which release corresponds to each branch, and what date th
 - [#2502][2502] Fix loading ELF files without valid .dynamic section
 - [#2476][2476] Deprecate 'keepends' argument in favor of 'drop' in `tube.recvline*`
 - [#2364][2364] Deprecate direct commandline scripts invocation and exclude nonsense ones
+- [#2506][2506] ROP: fix `ROP(ELF(exe)).leave` is `None` in some ELF
 
 [2471]: https://github.com/Gallopsled/pwntools/pull/2471
 [2358]: https://github.com/Gallopsled/pwntools/pull/2358
@@ -106,6 +107,7 @@ The table below shows which release corresponds to each branch, and what date th
 [2502]: https://github.com/Gallopsled/pwntools/pull/2502
 [2476]: https://github.com/Gallopsled/pwntools/pull/2476
 [2364]: https://github.com/Gallopsled/pwntools/pull/2364
+[2506]: https://github.com/Gallopsled/pwntools/pull/2506
 
 ## 4.14.0 (`beta`)