Add support for nginx:1.26

[todeveni]

Bare minimum self-checks

Fixes #49
Fixes #54

• I've updated this PR with the latest code from main
• I've done a cursory QA pass of my code locally
• I've ensured all automated status check and tests pass
• I've connected this PR to an issue

Pieces of flare

• I've written a unit or functional test for my code
• I've updated relevant documentation it my code changes it
• I've updated this repo's README if my code changes it
• I've updated this repo's CHANGELOG with my change unless its a trivial change (like updating a typo in the docs)

Finally

• I've requested a review with relevant people

If you have any issues or need help please join the #contributors channel in the Lando slack and someone will gladly help you out!

You can also check out the coder guide.

[netlify]

❌ Deploy Preview for lando-nginx failed. Why did it fail? →

Name	Link
🔨 Latest commit	fe06011
🔍 Latest deploy log	https://app.netlify.com/sites/lando-nginx/deploys/665f43efa17bdd00082a8aab

[reynoldsalec]

@todeveni this looks good! Last thing it needs is to add your examples/1.26 into the .github/workflows/pr-nginx-tests.yml and then I think we're ready to rock.