docs: Remove markdownlint and revert dependencies to ^ format (#593)

- Based on this discussion
apify/apify-sdk-python#747 (comment)
- Remove markdownlint and markdownlint-cli dependencies
- Remove lint:md and lint:md:fix scripts
- Revert dependency version formats from ">=x.x.x <1.0.0" to "^x.x.x":
  - docusaurus-gtm-plugin
  - @apify/eslint-config-ts
  - @apify/tsconfig
- Regenerate yarn.lock

Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: vdusek

website/package.json

@@ -12,10 +12,8 @@
         "version": "docusaurus version",
         "write-translations": "docusaurus write-translations",
         "prettify": "prettier --write --config ./tools/docs-prettier.config.js ../docs/*.md ../docs/*.mdx",
-        "lint": "yarn lint:md && yarn lint:code",
-        "lint:fix": "yarn lint:md:fix && yarn lint:code:fix",
-        "lint:md": "markdownlint --config ../.markdownlint.yaml '../docs/**/*.md' '../docs/**/*.mdx' --ignore '../docs/changelog.md'",
-        "lint:md:fix": "yarn lint:md --fix",
+        "lint": "yarn lint:code",
+        "lint:fix": "yarn lint:code:fix",
         "lint:code": "eslint .",
         "lint:code:fix": "eslint . --fix"
     },
@@ -29,24 +27,22 @@
         "@rspack/core": "<1.6.0",
         "@signalwire/docusaurus-plugin-llms-txt": "^1.2.2",
         "clsx": "^2.0.0",
-        "docusaurus-gtm-plugin": ">=0.0.2 <1.0.0",
+        "docusaurus-gtm-plugin": "^0.0.2",
         "prop-types": "^15.8.1",
         "raw-loader": "^4.0.2",
         "react": "^19.0.0",
         "react-dom": "^19.0.0",
         "unist-util-visit": "^5.0.0"
     },
     "devDependencies": {
-        "@apify/eslint-config-ts": ">=0.4.0 <1.0.0",
-        "@apify/tsconfig": ">=0.1.0 <1.0.0",
+        "@apify/eslint-config-ts": "^0.4.0",
+        "@apify/tsconfig": "^0.1.0",
         "@types/react": "^19.0.0",
         "@typescript-eslint/eslint-plugin": "^8.0.0",
         "@typescript-eslint/parser": "^8.0.0",
         "eslint": "^9.0.0",
         "eslint-plugin-react": "^7.32.2",
         "eslint-plugin-react-hooks": "^7.0.0",
-        "markdownlint": ">=0.39.0 <1.0.0",
-        "markdownlint-cli": ">=0.46.0 <1.0.0",
         "path-browserify": "^1.0.1",
         "prettier": "^3.0.0",
         "rimraf": "^6.0.0",