test(deps): add Node.js 26 (current) support

[MikeMcC399]

Situation

Node.js v26.0.0 (Current) was released on May 5, 2026.

Change

This PR adds Node.js 26:

• to the matrix of tested nodes under .github/workflows/example-node-versions.yml
• to the README sections that describe testing across multiple node versions in a matrix
• to the README > Node.js > Support section

Comments

• Since there is no change to the action itself, and the additional support of Node.js 26.x is an extension, there is no version change of the action.

• According to Node.js release schedule plans, Node.js 26.x is expected to transition to LTS status on Oct 28, 2026.

• Cypress itself continues to run under Node.js node24 within the action, and using the Cypress Module API, as explained in the README > Usage section.

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Note

Low Risk
Low risk: updates only CI example matrices and README documentation to include Node.js 26, without changing action/runtime behavior.

Overview
Adds Node.js 26 to the Node version matrix used by the example-node-versions GitHub Actions workflow, expanding CI coverage to run the same Cypress E2E example on 22/24/25/26.

Updates the README’s workflow snippets and the Node.js Support section to document 26.x as supported alongside 22.x, 24.x, and 25.x.

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