[flake8-quotes] Make example error out-of-the-box (Q003) (#19106)

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## Summary

<!-- What's the purpose of the change? What does it do, and why? -->

Part of #18972

This PR makes [avoidable-escaped-quote
(Q003)](https://docs.astral.sh/ruff/rules/avoidable-escaped-quote/#avoidable-escaped-quote-q003)'s
example error out-of-the-box

[Old example](https://play.ruff.rs/fb319d0f-8016-46a1-b6bb-42b1b054feea)
```py
foo = 'bar\'s'
```

[New example](https://play.ruff.rs/d9626561-0646-448f-9282-3f0691b90831)
```py
foo = "bar\"s"
```

The original example got overwritten by `Q000`, since double quotes is
the default config. The quotes were also switched in the "Use instead"
section.

## Test Plan

<!-- How was it tested? -->

N/A, no functionality/tests affected

crates/ruff_linter/src/rules/flake8_quotes/rules/avoidable_escaped_quote.rs

@@ -19,12 +19,12 @@ use crate::{AlwaysFixableViolation, Edit, Fix};
 ///
 /// ## Example
 /// ```python
-/// foo = 'bar\'s'
+/// foo = "bar\"s"
 /// ```
 ///
 /// Use instead:
 /// ```python
-/// foo = "bar's"
+/// foo = 'bar"s'
 /// ```
 ///
 /// ## Formatter compatibility