docs: various enhancements across /docs workspace (#31921)

Signed-off-by: hainenber <dotronghai96@gmail.com>

docs/docs/api.mdx

@@ -4,7 +4,6 @@ hide_title: true
 sidebar_position: 10
 ---
 
-import { Buffer } from 'buffer/index.js';
 import SwaggerUI from 'swagger-ui-react';
 import openapi from '/resources/openapi.json';
 import 'swagger-ui-react/swagger-ui.css';

docs/docs/configuration/setup-ssh-tunneling.mdx

@@ -1,6 +0,0 @@
----
-title: Setup SSH Tunneling
-hide_title: true
-sidebar_position: 8
-version: 1
----

docs/docs/contributing/howtos.mdx

@@ -10,7 +10,7 @@ version: 1
 
 The latest documentation and tutorial are available at https://superset.apache.org/.
 
-The documentation site is built using [Docusaurus 2](https://docusaurus.io/), a modern
+The documentation site is built using [Docusaurus 3](https://docusaurus.io/), a modern
 static website generator, the source for which resides in `./docs`.
 
 ### Local Development
@@ -223,9 +223,9 @@ To run a single test file:
 npm run test -- path/to/file.js
 ```
 
-### e2e Integration Testing
+### E2E Integration Testing
 
-For e2e testing, we recommend that you use a `docker compose` backend
+For E2E testing, we recommend that you use a `docker compose` backend
 
 ```bash
 CYPRESS_CONFIG=true docker compose up --build
@@ -411,7 +411,7 @@ See [set capabilities for a container](https://kubernetes.io/docs/tasks/configur
 
 Once the pod is running as root and has the `SYS_PTRACE` capability it will be able to debug the Flask app.
 
-You can follow the same instructions as in `docker compose`. Enter the pod and install the required library and packages; gdb, netstat and debugpy.
+You can follow the same instructions as in `docker compose`. Enter the pod and install the required library and packages: gdb, netstat and debugpy.
 
 Often in a Kubernetes environment nodes are not addressable from outside the cluster. VSCode will thus be unable to remotely connect to port 5678 on a Kubernetes node. In order to do this you need to create a tunnel that port forwards 5678 to your local machine.
 

docs/docs/contributing/misc.mdx

@@ -3,7 +3,7 @@ sidebar_position: 6
 version: 1
 ---
 
-# Misc.
+# Miscellaneous
 
 ## Reporting a Security Vulnerability
 
@@ -11,7 +11,7 @@ Please report security vulnerabilities to private@superset.apache.org.
 
 In the event a community member discovers a security flaw in Superset, it is important to follow the [Apache Security Guidelines](https://www.apache.org/security/committers.html) and release a fix as quickly as possible before public disclosure. Reporting security vulnerabilities through the usual GitHub Issues channel is not ideal as it will publicize the flaw before a fix can be applied.
 
-### SQL Lab Async
+## SQL Lab Async
 
 It's possible to configure a local database to operate in `async` mode,
 to work on `async` related features.
@@ -46,7 +46,7 @@ Note that:
   to your production environment, and use the similar broker as well as
   results backend configuration
 
-### Async Chart Queries
+## Async Chart Queries
 
 It's possible to configure database queries for charts to operate in `async` mode. This is especially useful for dashboards with many charts that may otherwise be affected by browser connection limits. To enable async queries for dashboards and Explore, the following dependencies are required:
 

docs/docs/faq.mdx

@@ -125,7 +125,7 @@ value in milliseconds in the JSON Metadata field:
 Here, the entire dashboard will refresh at once if periodic refresh is on. The stagger time of 2.5
 seconds is ignored.
 
-**Why does ‘flask fab’ or superset freezed/hung/not responding when started (my home directory is
+**Why does ‘flask fab’ or superset freeze/hang/not responding when started (my home directory is
 NFS mounted)?**
 
 By default, Superset creates and uses an SQLite database at `~/.superset/superset.db`. SQLite is