Update README.md to reflect the new version 0.0.5 for TestPyPI installation instructions.

Author: xiu-cs

README.md

@@ -19,7 +19,9 @@ conda activate fmpose_3d
 <!-- test version -->
 ```bash
 git clone xxxx.git  # clone this repo
-pip install --index-url https://test.pypi.org/simple/ --extra-index-url https://pypi.org/simple/ fmpose==0.0.4
+# TestPyPI (pre-release/testing build)
+pip install --index-url https://test.pypi.org/simple/ --extra-index-url https://pypi.org/simple/ fmpose==0.0.5
+# Future Official PyPI release
 # pip install fmpose
 ```