Update EU case study

[datejada]

Pull request details

Describe the changes made in this pull request

Update EU case study files with latest version. Thanks! @gzclarence

List of related issues or pull requests

Closes #776

Collaboration confirmation

As a contributor I confirm

• I read and followed the instructions in README.dev.md
• The documentation is up to date with the changes introduced in this Pull Request (or NA)
• Tests are passing
• Lint is passing

[github-actions]

Benchmark Results

	a40c96b...	764af4f...	a40c96b.../764af4fad4e6d4...
energy_problem/create_model	0.0721 ± 0.0034 h	0.0725 ± 0.0027 h	0.994
energy_problem/input_and_constructor	18.6 ± 1.9 s	18.5 ± 1.9 s	1.01
time_to_load	2.91 ± 0.0083 s	2.9 ± 0.035 s	1

	a40c96b...	764af4f...	a40c96b.../764af4fad4e6d4...
energy_problem/create_model	0.69 G allocs: 25.4 GB	0.69 G allocs: 25.4 GB	1
energy_problem/input_and_constructor	6.85 M allocs: 0.591 GB	6.85 M allocs: 0.591 GB	1
time_to_load	0.153 k allocs: 14.5 kB	0.153 k allocs: 14.5 kB	1

Benchmark Plots

A plot of the benchmark results have been uploaded as an artifact to the workflow run for this PR.
Go to "Actions"->"Benchmark a pull request"->[the most recent run]->"Artifacts" (at the bottom).