Minor typo: missing space (#2533)

* Add missing space

* It's -> its

Author: n8henrie

Contributing.md

@@ -96,7 +96,7 @@ If you are adding a new feature, you should add it to the `full` feature in our
 
 You can run these tests yourself with
 ```cargo xtask ci```
-See [it's documentation](https://github.com/PyO3/pyo3/tree/main/xtask#readme)for more commands you can run.
+See [its documentation](https://github.com/PyO3/pyo3/tree/main/xtask#readme) for more commands you can run.
 
 ## Python and Rust version support policy
 
@@ -132,15 +132,15 @@ Second, there is a Python-based benchmark contained in the `pytests` subdirector
 
 You can view what code is and isn't covered by PyO3's tests. We aim to have 100% coverage - please check coverage and add tests if you notice a lack of coverage!
 
-- First, generate a `lcov.info` file with 
+- First, generate a `lcov.info` file with
 ```shell
 cargo xtask coverage
 ```
 You can install an IDE plugin to view the coverage. For example, if you use VSCode:
 - Add the [coverage-gutters](https://marketplace.visualstudio.com/items?itemName=ryanluker.vscode-coverage-gutters) plugin.
 - Add these settings to VSCode's `settings.json`:
 ```json
-{    
+{
     "coverage-gutters.coverageFileNames": [
         "lcov.info",
         "cov.xml",