Update README.md

Set smaller image size for README screenshots.

README.md

@@ -25,17 +25,21 @@ Any parameters passed to `shell-picker` are passed to the real shell being run.
 7. Install iTerm2 either directly from [iTerm2 website](https://iterm2.com/), or through Homebrew `brew install iterm2`.
 8. From `/Applications` directory, copy `iTerm2.app` to `iTerm2_x86_64.app`.
 9. In `Finder`, highlight `iTerm2_x86_64.app` that was just copied and ***Get Info*** either from the menu, or using `⌘+i` shortcut. Only do this for `iTerm2_x86_64.app` and *not* `iTerm2.app`.
+
+    <p align="center">
+      <img src="README_images/iterm_config.png" alt="iTerm2 App Setup" width="400"/>
+    </p>
 
-    ![iTerm2 App Setup screenshot](./README_images/iterm_config.png "iTerm2 App Setup")
-
-10. In the Info dialog, check ***Open using Rosetta*** checkbox.
-11. Open `iTerm2.app`.
-12. In ***Settings*** (`⌘+,`), configure the default or desired profile in iTerm2 to use `shell-picker` by setting the full path for `shell-picker` in the ***Command*** section as a ***Custom Shell*** (or ***Command*** drop-down option).
+11. In the Info dialog, check ***Open using Rosetta*** checkbox.
+12. Open `iTerm2.app`.
+13. In ***Settings*** (`⌘+,`), configure the default or desired profile in iTerm2 to use `shell-picker` by setting the full path for `shell-picker` in the ***Command*** section as a ***Custom Shell*** (or ***Command*** drop-down option).
 
-    ![iTerm2 Profile Setup screenshot](./README_images/iterm_config-2.png "iTerm2 Profile Setup")
+    <p align="center">
+      <img src="README_images/iterm_config-2.png" alt="iTerm2 Profile Setup screenshot" width="700"/>
+    </p>
 
     Since the same iTerm2 Profiles are used for both copies of iTerm2*.app, then only need to configure `shell-picker` once.
-13. Completely stop all instances and restart iTerm2 (including any background `iTerm2Server` programs) or may get error starting.
+14. Completely stop all instances and restart iTerm2 (including any background `iTerm2Server` programs) or may get error starting.
 
 After validating, and configuring your .zshrc for either `arm64` and `x86_64`, finish by installing extra tooling, like Homebrew and necessary packages, in the `x86_64` shell.  Luckily Homebrew uses separate directories and installation instances between the two architectures: `/opt/homebrew` for Apple Silicon `arm64` and `/usr/local` for macOS Intel `x86_64`.