Update README.md in versions and branches

Ruby 3.4 has been released. Therefore, a branch will be create, and the README will be update.
https://www.ruby-lang.org/en/news/2024/12/25/ruby-3-4-0-released/

README.md

@@ -6,19 +6,31 @@
 
 Lrama is LALR (1) parser generator written by Ruby. The first goal of this project is providing error tolerant parser for CRuby with minimal changes on CRuby parse.y file.
 
-* [Features](#features)
-* [Installation](#installation)
-* [Usage](#usage)
-* [Versions and Branches](#versions-and-branches)
-* [Supported Ruby version](#supported-ruby-version)
-* [Development](#development)
-  * [How to generate parser.rb](#how-to-generate-parserrb)
-  * [Test](#test)
-  * [Call-stack Profiling Lrama](#call-stack-profiling-lrama)
-  * [Memory Profiling Lrama](#memory-profiling-lrama)
-  * [Build Ruby](#build-ruby)
-* [Release flow](#release-flow)
-* [License](#license)
+- [Lrama](#lrama)
+  - [Features](#features)
+  - [Installation](#installation)
+  - [Usage](#usage)
+  - [Versions and Branches](#versions-and-branches)
+    - [v0\_7 (`master` branch)](#v0_7-master-branch)
+    - [v0\_6 (`lrama_0_6` branch)](#v0_6-lrama_0_6-branch)
+    - [v0\_5 (`lrama_0_5` branch)](#v0_5-lrama_0_5-branch)
+    - [v0\_4 (`lrama_0_4` branch)](#v0_4-lrama_0_4-branch)
+  - [Supported Ruby version](#supported-ruby-version)
+  - [Development](#development)
+    - [How to generate parser.rb](#how-to-generate-parserrb)
+    - [Test](#test)
+    - [Call-stack Profiling Lrama](#call-stack-profiling-lrama)
+      - [1. Create parse.tmp.y in ruby/ruby](#1-create-parsetmpy-in-rubyruby)
+      - [2. Enable Profiler](#2-enable-profiler)
+      - [3. Run Lrama](#3-run-lrama)
+      - [4. Generate Flamegraph](#4-generate-flamegraph)
+    - [Memory Profiling Lrama](#memory-profiling-lrama)
+      - [1. Create parse.tmp.y in ruby/ruby](#1-create-parsetmpy-in-rubyruby-1)
+      - [2. Enable Profiler](#2-enable-profiler-1)
+      - [3. Run Lrama](#3-run-lrama-1)
+    - [Build Ruby](#build-ruby)
+  - [Release flow](#release-flow)
+  - [License](#license)
 
 ## Features
 
@@ -73,9 +85,13 @@ Enter the formula:
 
 ## Versions and Branches
 
-### v0_6 (`master` branch)
+### v0_7 (`master` branch)
 
-This branch is for Ruby 3.4. `lrama_0_6` branch is created from this branch, once Ruby 3.4 is released.
+This branch is for Ruby 3.5. `lrama_0_7` branch is created from this branch, once Ruby 3.5 is released.
+
+### v0_6 (`lrama_0_6` branch)
+
+This branch is for Ruby 3.4.
 
 ### v0_5 (`lrama_0_5` branch)