chore: modify new issues url to use a different url with a default template

[walteronoh]

Done

• Modified new issue urls from https://github.com/canonical/canonical.com/issues/new to https://github.com/canonical/canonical.com/issues/new?template=ISSUE_TEMPLATE.md which uses a default template.

QA

• Check out this feature branch
• Run the site using the command ./run serve
• View the site locally in your web browser at: http://0.0.0.0:8002/
• Run through the following QA steps
• [List additional steps to QA the new features or prove the bug has been resolved]

Issue / Card

Fixes #1227

Screenshots

[if relevant, include a screenshot]

[webteam-app]

walteronoh is not a collaborator of the repo

[codecov[bot]]

Codecov Report

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

Project coverage is 66.14%. Comparing base (364b56c) to head (f24ddc2). Report is 8 commits behind head on main.

:exclamation: Current head f24ddc2 differs from pull request most recent head cbc93c0. Consider uploading reports for the commit cbc93c0 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1231 +/- ## ======================================= Coverage 66.14% 66.14% ======================================= Files 10 10 Lines 898 898 ======================================= Hits 594 594 Misses 304 304 ``` | [Flag](https://app.codecov.io/gh/canonical/canonical.com/pull/1231/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=canonical) | Coverage Δ | | |---|---|---| | [python](https://app.codecov.io/gh/canonical/canonical.com/pull/1231/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=canonical) | `66.14% <ø> (ø)` | | 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=canonical#carryforward-flags-in-the-pull-request-comment) to find out more.

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