Update installation instructions based on directory moves (#436)

python/packages/autogen-core/docs/src/getting-started/installation.md

@@ -7,13 +7,13 @@ The repo is private, so the installation process is a bit more involved than usu
 Make a clone of the repo:
 
 ```sh
-git clone https://github.com/microsoft/autogen_core.git
+git clone https://github.com/microsoft/agnext.git
 ```
 
 You can install the package by running:
 
 ```sh
-cd autogen_core/python
+cd agnext/python/packages/autogen-core
 pip install .
 ```
 
@@ -23,7 +23,7 @@ To install the package from GitHub, you will need to authenticate with GitHub.
 
 ```sh
 GITHUB_TOKEN=$(gh auth token)
-pip install "git+https://oauth2:$GITHUB_TOKEN@github.com/microsoft/autogen_core.git#subdirectory=python"
+pip install "git+https://oauth2:$GITHUB_TOKEN@github.com/microsoft/agnext.git#subdirectory=python/packages/autogen-core"
 ```
 
 ### Using a Personal Access Token instead of `gh` CLI
@@ -32,6 +32,6 @@ If you don't have the `gh` CLI installed, you can generate a personal access tok
 
 1. Go to [New fine-grained personal access token](https://github.com/settings/personal-access-tokens/new)
 2. Set `Resource Owner` to `Microsoft`
-3. Set `Repository Access` to `Only select repositories` and select `Microsoft/autogen_core`
+3. Set `Repository Access` to `Only select repositories` and select `Microsoft/agnext`
 4. Set `Permissions` to `Repository permissions` and select `Contents: Read`
 5. Use the generated token for `GITHUB_TOKEN` in the commad above