all: rename book title

Update #1

pdf/zh-cn/Makefile

@@ -1,4 +1,4 @@
-title = '高速上手 C++11/14/17/20'
+title = '现代 C++ 教程：高速上手 C++11/14/17/20'
 filename = 'modern-cpp-tutorial'
 outputname='modern-cpp-tutorial'
 revision = $(shell git describe --always --tags)

pdf/zh-cn/aggregator.py

@@ -8,7 +8,7 @@ chapters = ['00-preface.md', '01-intro.md',  '02-usability.md', '03-runtime.md',
 ignores = ['TOC', '返回目录', '许可', 'license']
 
 head = """---
-title: "高速上手 C++11/14/17/20"
+title: "现代 C++ 教程：高速上手 C++11/14/17/20"
 author: 欧长坤 <hi@changkun.us>
 copyright: cc-by-nc-nd 4.0
 ---

pdf/zh-cn/meta/template.tex

@@ -164,7 +164,7 @@ $endif$
 \thispagestyle{plain}
 \begin{center}
   
-  {\LARGE\textbf{高速上手 C++11/14/17/20}}
+  {\LARGE\textbf{现代 C++ 教程：高速上手 C++11/14/17/20}}
   
   \vspace{1em}
   {\large 欧长坤 (hi@changkun.us)}