Add changelogs

Author: morganchen12

FirebaseAuth/CHANGELOG.md

@@ -1,3 +1,6 @@
+# Unreleased
+- [fixed] Replaced unsafe uses of `os_unfair_lock` (#14548).
+
 # 11.9.0
 - [changed] Using reCAPTCHA Enterprise and Firebase Auth requires reCAPTCHA
   Enterprise 18.7.0 or later.

FirebaseFunctions/CHANGELOG.md

@@ -1,3 +1,6 @@
+# Unreleased
+- [fixed] Replaced unsafe uses of `os_unfair_lock` (#14548).
+
 # 11.9.0
 - [fixed] Fixed App Check token reporting to enable differentiating outdated
   (`MISSING`) and inauthentic (`INVALID`) clients; see [Monitor App Check

FirebaseStorage/CHANGELOG.md

@@ -1,3 +1,6 @@
+# Unreleased
+- [fixed] Replaced unsafe uses of `os_unfair_lock` (#14548).
+
 # 11.1.0
 - [fixed] Fix a potential data race in Storage initialization. (#13369)
 

FirebaseVertexAI/CHANGELOG.md

@@ -1,6 +1,7 @@
 # Unreleased
 - [feature] The Vertex AI SDK no longer requires `@preconcurrency` when imported in Swift 6.
 - [feature] The Vertex AI Sample App now includes an image generation example.
+- [fixed] Replaced unsafe uses of `os_unfair_lock` (#14548).
 
 # 11.9.0
 - [feature] **Public Preview**: Added support for generating images using the