Grammatical Cleanup in ReadMe

https://bugs.webkit.org/show_bug.cgi?id=260539

Reviewed by Sammy Gill.

Noticed an extra 'to' in the ReadMe.
Surrond a script with a code block make it looker nicer.

* ReadMe.md:

Canonical link: https://commits.webkit.org/267151@main

ReadMe.md

@@ -13,7 +13,7 @@ On macOS, [download Safari Technology Preview](https://webkit.org/downloads/) to
 ## Reporting Bugs
 
 1. [Search WebKit Bugzilla](https://bugs.webkit.org/query.cgi?format=specific&product=WebKit) to see if there is an existing report for the bug you've encountered.
-2. [Create a Bugzilla account](https://bugs.webkit.org/createaccount.cgi) to to report bugs (and to comment on them) if you haven't done so already.
+2. [Create a Bugzilla account](https://bugs.webkit.org/createaccount.cgi) to report bugs (and comment on them) if you haven't done so already.
 3. File a bug in accordance with [our guidelines](https://webkit.org/bug-report-guidelines/).
 
 Once your bug is filed, you will receive email when it is updated at each stage in the [bug life cycle](https://webkit.org/bug-life-cycle). After the bug is considered fixed, you may be asked to download the [latest nightly](https://webkit.org/nightly) and confirm that the fix works for you.
@@ -144,7 +144,7 @@ In both cases, if you have built release builds instead, use `--release` instead
 
 ### Linux Ports
 
-If you have a development build, you can use the run-minibrowser script, e.g.:
+If you have a development build, you can use the `run-minibrowser` script, e.g.:
 
 ```
 run-minibrowser --debug --wpe