Fix documentation errors: title capitalization, email spelling, and grammar improvements

Co-authored-by: fi3ework <[email protected]>

Author: Copilot

CODE_OF_CONDUCT.md

@@ -1,4 +1,4 @@
-# Contributor covenant code of conduct
+# Contributor Covenant Code of Conduct
 
 ## Our pledge
 
@@ -52,7 +52,7 @@ decisions when appropriate.
 
 This Code of Conduct applies within all community spaces, and also applies when
 an individual is officially representing the community in public spaces.
-Examples of representing our community include using an official e-mail address,
+Examples of representing our community include using an official email address,
 posting via an official social media account, or acting as an appointed
 representative at an online or offline event.
 

website/docs/en/guide/faq/features.mdx

@@ -39,7 +39,7 @@ export default defineConfig({
 
 ### How to skip the processing of static asset files in bundleless mode?
 
-In bundleless mode, Rslib transforms the source static asset file into a JavaScript file and a static asset file that is emitted according to [output.distPath](/config/rsbuild/output#outputdistpath) by default with preserving the `import` or `require` statements for static assets. To skip the above processing of static asset files, you need to:
+In bundleless mode, Rslib transforms the source static asset file into a JavaScript file and a static asset file that is emitted according to [output.distPath](/config/rsbuild/output#outputdistpath) by default, while preserving the `import` or `require` statements for static assets. To skip the above processing of static asset files, you need to:
 
 1. Set `source.entry` to remove static asset files from the entry.
 2. Set `output.copy` to copy static asset files to the output directory.

website/docs/en/guide/migration/tsup.mdx

@@ -66,6 +66,6 @@ Here is the corresponding Rslib configuration for tsup configuration:
 
 ## Contents supplement
 
-The current document only covers part of the migration process. If you find suitable content to add, feel free to contribute to the documentation via pull request 🤝.
+The current document only covers part of the migration process. If you find suitable content to add, feel free to contribute to the documentation via a pull request 🤝.
 
 > The documentation for Rslib can be found in the [rslib/website](https://github.com/web-infra-dev/rslib/tree/main/website) directory.