chore: 12.0.2 changelog

Also, add missing committers for 12.0.1 and 12.0.0 (/cc @gladwearefriends)

CHANGELOG.md

@@ -1,3 +1,18 @@
+# 12.0.2
+
+### :memo: Documentation
+- Explain why `.tooltipped` should be used sparingly [#676](https://github.com/primer/css/pull/676)
+- Fix trailing slash errors in Next.js [#681](https://github.com/primer/css/pull/681)
+- Add static assets to Now deployments [#687](https://github.com/primer/css/pull/687)
+- Shiny new social and README header by @ashygee [#689](https://github.com/primer/css/pull/689)
+
+### :house: Internal
+- Remove `postversion` script from `package.json` and update the [PR template](https://github.com/primer/css/blob/master/RELEASING.md#in-this-repo)
+
+#### Committers: 2
+- Ash Guillaume ([ashygee](https://github.com/ashygee))
+- Shawn Allen ([shawnbot](https://github.com/shawnbot))
+
 # 12.0.1
 
 ### :bug: Bug Fix
@@ -8,6 +23,10 @@
 ### :house: Internal
 - Add `postversion` npm script that commits `package.json` and `package-lock.json` with consistent commit messages (`chore: v<version>`)
 
+#### Committers: 2
+- Catherine Bui ([gladwearefriends](https://github.com/gladwearefriends))
+- Shawn Allen ([shawnbot](https://github.com/shawnbot))
+
 # 12.0.0
 
 :rotating_light: **Starting with version 12.0.0, the `primer` package is now known as `@primer/css`**. See [MIGRATING.md](https://github.com/primer/css/tree/master/MIGRATING.md) for more info.
@@ -15,6 +34,10 @@
 #### :boom: Breaking Change
 * [#666](https://github.com/primer/css/pull/666) Reorganize into a single `@primer/css` package ([@shawnbot](https://github.com/shawnbot))
 
+#### Committers: 2
+- Shawn Allen ([shawnbot](https://github.com/shawnbot))
+- Catherine Bui ([gladwearefriends](https://github.com/gladwearefriends))
+
 # 11.0.0
 
 #### :boom: Breaking Change