build(deps-dev): bump jest and @types/jest

Bumps [jest](https://github.com/jestjs/jest/tree/HEAD/packages/jest) and [@types/jest](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/jest). These dependencies needed to be updated together.

Updates `jest` from 29.7.0 to 30.2.0
- [Release notes](https://github.com/jestjs/jest/releases)
- [Changelog](https://github.com/jestjs/jest/blob/main/CHANGELOG.md)
- [Commits](https://github.com/jestjs/jest/commits/v30.2.0/packages/jest)

Updates `@types/jest` from 29.5.14 to 30.0.0
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/jest)

---
updated-dependencies:
- dependency-name: jest
  dependency-version: 30.2.0
  dependency-type: direct:development
  update-type: version-update:semver-major
- dependency-name: "@types/jest"
  dependency-version: 30.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

examples.md

@@ -25,7 +25,6 @@
 - [Node - Yarn](#node---yarn)
 - [Node - Yarn 2](#node---yarn-2)
 - [OCaml/Reason - esy](#ocamlreason---esy)
-- [OCaml/Reason - opam](#ocamlreason---opam)
 - [PHP - Composer](#php---composer)
 - [Python - pip](#python---pip)
   - [Simple example](#simple-example)
@@ -438,30 +437,6 @@ Esy allows you to export built dependencies and import pre-built dependencies.
       if: steps.restore-cache.outputs.cache-hit != 'true'
 ```
 
-## OCaml/Reason - opam
-
-This example requires you to have `opam.locked` file which you can generate with `opam lock .`.
-
-It's worth noting that even if lock file was change, it might be optimal to restore previous cache, so `hashFiles` in the key and if statement in "Save opam cache" step are optional.
-```yaml
-    - name: Restore opam cache
-      id: restore-cache
-      uses: actions/cache/restore@v4
-      with:
-        path: _opam
-        key: ${{ runner.os }}-opam-${{ hashFiles('opam.locked') }}
-
-    - name: Install dependencies
-      run: opam install . --locked --deps-only -y
-
-    - name: Save opam cache
-      if: steps.restore-cache.outputs.cache-hit != 'true'
-      uses: actions/cache/save@v4
-      with:
-        path: _opam
-        key: ${{ steps.restore-cache.outputs.cache-primary-key }}
-```
-
 ## PHP - Composer
 
 ```yaml

package.json

@@ -29,7 +29,7 @@
     "@actions/io": "^2.0.0"
   },
   "devDependencies": {
-    "@types/jest": "^29.5.14",
+    "@types/jest": "^30.0.0",
     "@types/nock": "^11.1.0",
     "@types/node": "^24.1.0",
     "@typescript-eslint/eslint-plugin": "^7.2.0",
@@ -41,7 +41,7 @@
     "eslint-plugin-jest": "^27.9.0",
     "eslint-plugin-prettier": "^5.5.3",
     "eslint-plugin-simple-import-sort": "^12.1.1",
-    "jest": "^29.7.0",
+    "jest": "^30.2.0",
     "jest-circus": "^29.7.0",
     "nock": "^13.2.9",
     "prettier": "^3.6.2",