Prepare for 12.0.0-beta.7 release (#7792)

Author: fhammerschmidt

CHANGELOG.md

@@ -10,11 +10,7 @@
 > - :nail_care: [Polish]
 > - :house: [Internal]
 
-# 12.0.0-beta.7 (Unreleased)
-
-#### :boom: Breaking Change
-
-#### :eyeglasses: Spec Compliance
+# 12.0.0-beta.7
 
 #### :rocket: New Feature
 
@@ -29,15 +25,11 @@
 - Fix ppx resolution with package inside monorepo. https://github.com/rescript-lang/rescript/pull/7776
 - Fix 'Unbound module type' errors that occurred when trying to async import modules. https://github.com/rescript-lang/rescript/pull/7783
 
-#### :memo: Documentation
-
 #### :nail_care: Polish
 
 - Allow skipping the leading pipe in variant definition with a leading constructor with an attribute. https://github.com/rescript-lang/rescript/pull/7782
 - Better error message (and recovery) when using a keyword as a record field name. https://github.com/rescript-lang/rescript/pull/7784
 
-#### :house: Internal
-
 # 12.0.0-beta.6
 
 #### :boom: Breaking Change