fix and upgrade: gcc 14 install for new code compile

Author: Charliechen114514

.github/workflows/build-examples.yml

@@ -27,7 +27,11 @@ jobs:
       - name: Install build tools
         run: |
           sudo apt-get update
-          sudo apt-get install -y cmake g++ ninja-build
+          sudo apt-get install -y cmake g++-14 ninja-build
+          sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-14 100
+          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-14 100
+          sudo update-alternatives --install /usr/bin/c++ c++ /usr/bin/g++-14 100
+          sudo update-alternatives --install /usr/bin/cc cc /usr/bin/gcc-14 100
 
       - name: Build host examples
         run: python3 scripts/build_examples.py --host

documents/vol9-open-source-project-learn/chrome/01_once_callback/full/01-1-once-callback-motivation-and-api-design.md

@@ -12,7 +12,7 @@ tags:
 difficulty: beginner
 platform: host
 cpp_standard: [23]
-reading_time_minutes: 25
+reading_time_minutes: 11
 prerequisites:
   - "OnceCallback 前置知识（一）：函数类型与模板偏特化"
   - "OnceCallback 前置知识（五）：std::move_only_function"

documents/vol9-open-source-project-learn/chrome/01_once_callback/full/01-2-once-callback-core-skeleton.md

@@ -13,7 +13,7 @@ tags:
 difficulty: beginner
 platform: host
 cpp_standard: [23]
-reading_time_minutes: 30
+reading_time_minutes: 13
 prerequisites:
   - "OnceCallback 实战（一）：动机与接口设计"
   - "OnceCallback 前置知识（一）：函数类型与模板偏特化"

documents/vol9-open-source-project-learn/chrome/01_once_callback/full/01-3-once-callback-bind-once.md

@@ -13,7 +13,7 @@ tags:
 difficulty: beginner
 platform: host
 cpp_standard: [23]
-reading_time_minutes: 25
+reading_time_minutes: 9
 prerequisites:
   - "OnceCallback 实战（二）：核心骨架搭建"
   - "OnceCallback 前置知识（二）：std::invoke 与统一调用协议"

documents/vol9-open-source-project-learn/chrome/01_once_callback/full/01-4-once-callback-cancellation-token.md

@@ -14,7 +14,7 @@ tags:
 difficulty: beginner
 platform: host
 cpp_standard: [23]
-reading_time_minutes: 20
+reading_time_minutes: 9
 prerequisites:
   - "OnceCallback 实战（二）：核心骨架搭建"
   - "OnceCallback 前置知识速查：C++11/14/17 核心特性回顾"

documents/vol9-open-source-project-learn/chrome/01_once_callback/full/01-5-once-callback-then-chaining.md

@@ -13,7 +13,7 @@ tags:
 difficulty: beginner
 platform: host
 cpp_standard: [23]
-reading_time_minutes: 25
+reading_time_minutes: 9
 prerequisites:
   - "OnceCallback 实战（二）：核心骨架搭建"
   - "OnceCallback 前置知识（二）：std::invoke 与统一调用协议"

documents/vol9-open-source-project-learn/chrome/01_once_callback/full/01-6-once-callback-testing-and-perf.md

@@ -12,7 +12,7 @@ tags:
 difficulty: beginner
 platform: host
 cpp_standard: [23]
-reading_time_minutes: 25
+reading_time_minutes: 10
 prerequisites:
   - "OnceCallback 实战（二）：核心骨架搭建"
   - "OnceCallback 实战（三）：bind_once 实现"

documents/vol9-open-source-project-learn/chrome/01_once_callback/full/pre-01-once-callback-function-type-and-specialization.md

@@ -12,7 +12,7 @@ tags:
 difficulty: intermediate
 platform: host
 cpp_standard: [11, 14, 17, 20]
-reading_time_minutes: 20
+reading_time_minutes: 10
 prerequisites:
   - "OnceCallback 前置知识速查：C++11/14/17 核心特性回顾"
 related:

documents/vol9-open-source-project-learn/chrome/01_once_callback/full/pre-02-once-callback-invoke-and-callable.md

@@ -12,7 +12,7 @@ tags:
 difficulty: intermediate
 platform: host
 cpp_standard: [17]
-reading_time_minutes: 20
+reading_time_minutes: 10
 prerequisites:
   - "OnceCallback 前置知识速查：C++11/14/17 核心特性回顾"
   - "OnceCallback 前置知识（一）：函数类型与模板偏特化"

documents/vol9-open-source-project-learn/chrome/01_once_callback/full/pre-03-once-callback-lambda-advanced.md

@@ -12,7 +12,7 @@ tags:
 difficulty: intermediate
 platform: host
 cpp_standard: [14, 17, 20, 23]
-reading_time_minutes: 25
+reading_time_minutes: 11
 prerequisites:
   - "OnceCallback 前置知识速查：C++11/14/17 核心特性回顾"
 related: