[Infra] Add changelog versions for Firebase 12 (#15092)

Crashlytics/CHANGELOG.md

@@ -1,4 +1,4 @@
-# Unreleased
+# 12.0.0
 - [fixed] Resolved compiler warnings related to constant definitions. (#15059)
 
 # 11.13.0

FirebaseAI/CHANGELOG.md

@@ -1,4 +1,4 @@
-# Unreleased
+# 12.0.0
 - [added] Added support for Grounding with Google Search. (#15014)
 - [removed] Removed `CountTokensResponse.totalBillableCharacters` which was
   deprecated in 11.15.0. Use `totalTokens` instead. (#15056)

FirebaseAuth/CHANGELOG.md

@@ -1,4 +1,4 @@
-# Unreleased
+# 12.0.0
 - [removed] **Breaking Change**: Removed the following Dynamic Links related
   APIs:
   - `ActionCodeSettings.dynamicLinkDomain`

FirebaseCore/CHANGELOG.md

@@ -1,4 +1,4 @@
-# Unreleased
+# Firebase 12.0.0
 - [changed] **Breaking change**: Firebase's minimum supported versions have
   updated for the following platforms:
     - | Platform  | Firebase 12 |

FirebaseFunctions/CHANGELOG.md

@@ -1,4 +1,4 @@
-# Unreleased
+# 12.0.0
 - [changed] **Breaking Change**: Mark `HTTPSCallable` and `HTTPSCallableOptions`
   as `final` classes for Swift clients. This was to achieve Swift 6 checked
   `Sendable` support.

FirebaseRemoteConfig/CHANGELOG.md

@@ -1,4 +1,4 @@
-# Unreleased
+# 12.0.0
 - [added] Improved how the SDK handles real-time requests when a Firebase
   project has exceeded its available quota for real-time services.
   Released in anticipation of future quota enforcement, this change is

FirebaseStorage/CHANGELOG.md

@@ -1,4 +1,4 @@
-# Unreleased
+# 12.0.0
 - [removed] **Breaking change**: Removed the following unused API,
   `StorageMetadata.storageReference`.