Add July 1st meeting information

Author: arora-aman

meetings.md

@@ -1,4 +1,6 @@
 | Date           | Topic                                      | Notes                                    | Recording                                | 
 |----------------|--------------------------------------------|------------------------------------------|------------------------------------------|
-| May 12, 2020   | Overview of relevant parts of rustc, and discuss plan at a high level. | [HackMD](https://hackmd.io/5N94DPFWQwCbjfYPMXFyGA) | [Youtube](https://www.youtube.com/watch?v=41pnkSS6MzY) |
+| May 12, 2020   | Overview of relevant parts of rustc, and discuss plan at a high level. | [HackMD](https://hackmd.io/5N94DPFWQwCbjfYPMXFyGA) | [YouTube](https://www.youtube.com/watch?v=41pnkSS6MzY) |
 | June 9, 2020   | Sync meeting - discuss `hir::Place` refactor | [Hackmd](https://hackmd.io/BVFNLHnvSrG-d4MAshjmew) | [YouTube](https://youtu.be/CAX7b_wU2Os) |
+| July 1, 2020   | Discuss the closure refactor doc             | [Github](https://github.com/rust-lang/project-rfc-2229/commit/1457ad86c7387826277d635b5bb286b50a08da1a) | [YouTube](https://youtu.be/TBDrWFhcYWY) |
+