Update timeline.qmd

Author: hfrick

proposal/timeline.qmd

@@ -16,7 +16,7 @@ important because projects need to get up and running quickly.
 ## Technical delivery
 <!--
 Covering the actual delivery of the project this section should
-provide at least a high-level the implementation.
+provide at least a high-level description of the implementation.
 
 Including target dates is really important as you need to be committed
 and the ISC need to have a means of tracking delivery
@@ -30,7 +30,7 @@ facilitate successful delivery of the project.
 
  - [ ] Announcement post
  - [ ] Delivery blog post
- - [ ] Twitter
+ - [ ] Social media
  - [ ] UseR!
  - [ ] ISC meetings
 -->