Update BUILD_OSS to 5346

Features
* Updated the year to 2024
* Added 歲 (U+6B72) as a 旧字体 of 歳 (U+6B73) (#860)
* Updated the Emoji version to 15.1

Build
* Switched to Qt 6.6.1 for macOS and Windows (#846)
* Supported Bazel 7.0.0
* Updated the rule_apple version to 3.1.1
* Updated the default mac_sdk for GYP from 13.0 to 13.3
* Supported the GYP Windows build with 64 or more cores

Code
* Performed code refactoring
* Added UPDATE_COMPOSITION to the session commands

PiperOrigin-RevId: 599730868

src/data/version/mozc_version_template.bzl

@@ -32,7 +32,7 @@ MAJOR = 2
 MINOR = 29
 
 # BUILD number used for the OSS version.
-BUILD_OSS = 5291
+BUILD_OSS = 5346
 
 # Number to be increased. This value may be replaced by other tools.
 BUILD = BUILD_OSS