Refine some expressions to make docs clearer

Author: lemorage

docs/docs/core/initialization.mdx

@@ -34,7 +34,7 @@ When you use the `cocoindex` command-line tool, the library is automatically ini
     *   Loaded variables do **not** override existing system ones.
 
 2. **Automatic Library Initialization**:
-    *   The CLI automatically prepares everything using environment variables — no manual setup required.
+    *   Then, the CLI automatically prepares everything using loaded environment variables — no manual setup required.
     *   Your script (e.g. `main.py`) is just used to discover defined flows.
 
     See [Environment Variables](#environment-variables) for supported variables.

docs/docs/getting_started/quickstart.md

@@ -268,7 +268,7 @@ It interacts with users and search the database by calling the `search()` method
 
 ### Step 4.4: Run queries against the index
 
-Now we can run the same Python file, which will run the new main function:
+Now we can run the same Python file, which will run the new added main logic:
 
 ```bash
 python quickstart.py