Fix starlette.templating deprecation warning

[northwestwitch]

Description

Fixed

• Fix #331

How to test

• [x] Automatic test

Expected outcome

• [x] Demo report should be visible when app is deployed locally

Review

• [x] Tests executed by GitHub actions, CR
• [ ] "Merge and deploy" approved by

This version is a

• [ ] MAJOR - when you make incompatible API changes
• [ ] MINOR - when you add functionality in a backwards compatible manner
• [x] PATCH - when you make backwards compatible bug fixes or documentation/instructions

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.52%. Comparing base (4c8ac1b) to head (928003a). Report is 47 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #333 +/- ## ========================================== + Coverage 94.40% 94.52% +0.11% ========================================== Files 35 36 +1 Lines 2002 2044 +42 ========================================== + Hits 1890 1932 +42 Misses 112 112 ``` | [Flag](https://app.codecov.io/gh/Clinical-Genomics/chanjo2/pull/333/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Clinical-Genomics) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/Clinical-Genomics/chanjo2/pull/333/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Clinical-Genomics) | `94.52% <ø> (+0.11%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Clinical-Genomics#carryforward-flags-in-the-pull-request-comment) to find out more.

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[northwestwitch]

Demo report and demo overview pages still work fine: