Add Node.js v26 to benchmarks

[IlyasShabi]

What does this PR do?:
Add Node.js v26 to benchmarks matrix.

Motivation:
As we aim to support Node.js v26 we also should be able to run benchmarks with Node.js v26

[github-actions]

Overall package size

Self size: 2 MB
Deduped: 2.36 MB
No deduping: 2.36 MB

Dependency sizes

| name | version | self size | total size | |------|---------|-----------|------------| | source-map | 0.7.6 | 185.63 kB | 185.63 kB | | pprof-format | 2.2.1 | 163.06 kB | 163.06 kB | | node-gyp-build | 4.8.4 | 13.86 kB | 13.86 kB |

_{🤖 This report was automatically generated by heaviest-objects-in-the-universe}