Add Canary Islands geoid file

[jjimenezshaw]

... in grid_alternatives.sql

• Added clear title that can be used to generate release notes

After adding the file in PROJ-data OSGeo/PROJ-data#43, adding to grid_alternatives.sql is needed.

[jjimenezshaw]

Travis CI has a strange behaviour. I can see 3 tasks for travis, when I would expect only 1. Two of them are not finished, but green when you open them. What is going on?

[rouault]

What is going on?

no idea, but I see that from time to time. Anyway this PR looks good. Merging

[PROJ-BOT]

The backport to 7.1 failed:

The process 'git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-7.1 7.1
# Navigate to the new working tree
cd .worktrees/backport-7.1
# Create a new branch
git switch --create backport-2312-to-7.1
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick 17827338d04079fec13e40a3b24d9c159007dde5
# Push it to GitHub
git push --set-upstream origin backport-2312-to-7.1
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-7.1

Then, create a pull request where the base branch is 7.1 and the compare/head branch is backport-2312-to-7.1.

[rouault]

Manually cherry-picked in 7.1 per 93e3ec8