fix: talk formats to match Conference Hall source of truth

[Copilot]

The CFP section displayed outdated formats (Lightning Talk 15min, Talk 30min) that didn't match what's actually configured in Conference Hall.

Changes

• en.ts / fr.ts: Replace 2 incorrect formats with the 3 correct ones:
  • Conference (30 minutes) — full presentation
  • Short talk (10 minutes) — focused single-topic format
  • Lightning Talk (5 minutes) — high-density challenge format

Descriptions sourced verbatim from Conference Hall, with French translations in fr.ts.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Talks formats are not aligned with the real ones</issue_title>
<issue_description>On conference haal (the source of truth) we have this formats :

Conference (30 minutes)
Come share your Cloud Native passion in this 30 minutes presentation format. From your Return On Experience with Platform Engineering to showing us the latest and cooled OSS Tool, there is room for a lof of topics.

Short talk (10 minutes)
Challenging format where you need to focus on one topic that matters for you, from doing a live coding demo to sharing tips on how to be a happier developer.

Lightening Talk (5 minutes)
The most challenging format, 5 minutes is short but you would be amazed by the amount of info or passion you can transmit in such a short time. Take the challenge.

We shiould update the website to reflect the conference hall formats</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Talks formats are not aligned with the real ones #127

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Code Coverage Report

Coverage Results

Test Results

Status	Count
✅ Passed	72
❌ Failed	0
⏭️ Skipped	0
Total	72

✅ Pass Rate: 100.0%

Coverage

Metric	Covered	Total	Percentage
Lines	483	509	94.89%
Branches	380	452	84.07%
Functions	118	122	96.72%

Overall: 94.89% 🟢
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