Update the doc for spdlog installation.md (open-mmlab#1994)

* Update build_from_source.md

* Update build_from_source.md

* resolve comments

---------

Co-authored-by: RunningLeon <mnsheng@yeah.net>

Author: stozn

docs/en/01-how-to-build/build_from_source.md

@@ -21,6 +21,11 @@ Note:
   git clone git@github.com:pybind/pybind11.git pybind11
   cd pybind11
   git checkout 70a58c5
+
+  cd ..
+  git clone git@github.com:gabime/spdlog.git spdlog
+  cd spdlog
+  git checkout 9e8e52c048
   ```
 
 - If it fails when `git clone` via `SSH`, you can try the `HTTPS` protocol like this:

docs/zh_cn/01-how-to-build/build_from_source.md

@@ -22,6 +22,11 @@ git clone -b 1.x git@github.com:open-mmlab/mmdeploy.git --recursive
   git clone git@github.com:pybind/pybind11.git pybind11
   cd pybind11
   git checkout 70a58c5
+
+  cd ..
+  git clone git@github.com:gabime/spdlog.git spdlog
+  cd spdlog
+  git checkout 9e8e52c048
   ```
 
 - 如果以 `SSH` 方式 `git clone` 代码失败，您可以尝试使用 `HTTPS` 协议下载代码：