README: move troubleshooting note higher

README.md

@@ -402,15 +402,15 @@ You can pass options to Python's `configure` and compiler flags to customize the
 see [_Special environment variables_ in Python-Build's README](plugins/python-build/README.md#special-environment-variables)
 for details.
 
-**NOTE:** If you'd like a faster interpreter at the cost of longer build times,
-see [_Building for maximum performance_ in Python-Build's README](plugins/python-build/README.md#building-for-maximum-performance).
+**NOTE:** If you are having trouble installing a Python version,
+please visit the wiki page about
+[Common Build Problems](https://github.com/pyenv/pyenv/wiki/Common-build-problems).
 
 **NOTE:** If you want to use proxy for download, please set the `http_proxy` and `https_proxy`
 environment variables.
 
-**NOTE:** If you are having trouble installing a Python version,
-please visit the wiki page about
-[Common Build Problems](https://github.com/pyenv/pyenv/wiki/Common-build-problems).
+**NOTE:** If you'd like a faster interpreter at the cost of longer build times,
+see [_Building for maximum performance_ in Python-Build's README](plugins/python-build/README.md#building-for-maximum-performance).
 
 
 #### Prefix auto-resolution to the latest version