docs: remove redundant H1's (#2056)

<!-- CURSOR_SUMMARY -->
> [!NOTE]
> Removes redundant in-body H1s and standardizes frontmatter titles
across Academy docs, with minor copy edits; updates Vale config and
accepted vocabulary.
> 
> - **Docs cleanup & consistency**:
> - Remove redundant top-level `#` headings across many
`sources/academy/**` pages; rely on frontmatter titles.
> - Normalize/adjust frontmatter titles (e.g., “Dynamic pages and
single-page applications”, “The Apify API”, “Puppeteer and Playwright
course”, etc.).
> - Minor copy edits: capitalization (e.g., `CAPTCHAs`), small
wording/link tweaks, section heading level fixes, typo/grammar nits, and
note/guide clarifications.
> - **Linting/Style**:
>   - `.vale.ini`: disable `Microsoft.Units` rule.
> - Vocabulary: expand accepted terms (e.g., `reCAPTCHA?`, product/tool
names, acronyms, brands) in `.github/styles/.../accept.txt`.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
04f14b0. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: TC-MO

.github/styles/config/vocabularies/Docs/accept.txt

@@ -45,7 +45,7 @@ idempotency
 backoff
 
 Authy
-reCaptcha
+reCAPTCHA?
 OAuth
 untrusted
 unencrypted

.vale.ini

@@ -26,6 +26,7 @@ Microsoft.Foreign = NO
 Microsoft.We = NO
 Microsoft.Quotes = NO
 Microsoft.Auto = NO
+Microsoft.Units = NO
 Microsoft.URLFormat = NO
 Microsoft.GeneralURL = NO
 

sources/academy/glossary/concepts/dynamic_pages.md

@@ -1,12 +1,10 @@
 ---
-title: Dynamic pages
+title: Dynamic pages and single-page applications
 description: Understand what makes a page dynamic, and how a page being dynamic might change your approach when writing a scraper for it.
 sidebar_position: 8.3
 slug: /concepts/dynamic-pages
 ---
 
-# Dynamic pages and single-page applications (SPAs) {#dynamic-pages}
-
 **Understand what makes a page dynamic, and how a page being dynamic might change your approach when writing a scraper for it.**
 
 ---

sources/academy/glossary/concepts/http_cookies.md

@@ -5,8 +5,6 @@ sidebar_position: 8.2
 slug: /concepts/http-cookies
 ---
 
-# HTTP cookies {#cookies}
-
 **Learn a bit about what cookies are, and how they are utilized in scrapers to appear logged-in, view specific data, or even avoid blocking.**
 
 ---

sources/academy/glossary/concepts/http_headers.md

@@ -5,8 +5,6 @@ sidebar_position: 8.1
 slug: /concepts/http-headers
 ---
 
-# HTTP headers {#headers}
-
 **Understand what HTTP headers are, what they're used for, and three of the biggest differences between HTTP/1.1 and HTTP/2 headers.**
 
 ---

sources/academy/glossary/concepts/index.md

@@ -6,8 +6,6 @@ category: glossary
 slug: /concepts
 ---
 
-# Concepts 🤔 {#concepts}
-
 **Learn about some common yet tricky concepts and terms that are used frequently within the academy, as well as in the world of scraper development.**
 
 ---

sources/academy/glossary/concepts/robot_process_automation.md

@@ -5,8 +5,6 @@ sidebar_position: 8.7
 slug: /concepts/robotic-process-automation
 ---
 
-# What is robotic process automation (RPA)? {#what-is-robotic-process-automation-rpa}
-
 **Learn the basics of robotic process automation. Make your processes on the web and other software more efficient by automating repetitive tasks.**
 
 ---

sources/academy/glossary/glossary.md

@@ -6,8 +6,6 @@ category: glossary
 slug: /glossary
 ---
 
-# Why a glossary? {#why-a-glossary}
-
 **Browse important web scraping concepts, tools and topics in succinct articles explaining common web development terms in a web scraping and automation context.**
 
 ---

sources/academy/glossary/tools/apify_cli.md

@@ -5,8 +5,6 @@ sidebar_position: 9.1
 slug: /tools/apify-cli
 ---
 
-# The Apify CLI {#the-apify-cli}
-
 **Learn about, install, and log into the Apify CLI - your best friend for interacting with the Apify platform via your terminal.**
 
 ---
@@ -15,7 +13,7 @@ The [Apify CLI](/cli) helps you create, develop, build and run Apify Actors, and
 
 ## Installing {#installing}
 
-To install the Apfiy CLI, you'll first need npm, which comes preinstalled with Node.js. If you haven't yet installed Node, learn how to do that [here](../../webscraping/scraping_basics_javascript/data_extraction/computer_preparation.md). Additionally, make sure you've got an Apify account, as you will need to log in to the CLI to gain access to its full potential.
+To install the Apfiy CLI, you'll first need npm, which comes preinstalled with Node.js. If you haven't yet installed Node, [learn how to do that](../../webscraping/scraping_basics_javascript/data_extraction/computer_preparation.md). Additionally, make sure you've got an Apify account, as you will need to log in to the CLI to gain access to its full potential.
 
 Open up a terminal instance and run the following command:
 

sources/academy/glossary/tools/edit_this_cookie.md

@@ -5,8 +5,6 @@ sidebar_position: 9.7
 slug: /tools/edit-this-cookie
 ---
 
-# What's EditThisCookie? {#what-is-it}
-
 **Learn how to add, delete, and modify different cookies in your browser for testing purposes using the EditThisCookie Chrome extension.**
 
 ---