build: bump android ndk to 26

[scarf005]

Checklist

Required

• I wrote the PR title in conventional commit format.
• I ran the code formatter.
• I linked any relevant issues using github keyword syntax so it can be closed automatically.
• I have committed my changes to new branch that isn't main so it won't cause conflict when updating main branch later.

Optional

• This is a PR that modifies build process or code organization.

(skipping docs step because it's a only a version bump)

Purpose of change

support C++20 features fully and prevent this from happening

Describe the solution

bump NDK to 26

[OrenAudeles]

simple version bump, necessary for concepts and requires PRs going forward.