Updated webauthn quickstarts

[FroMage]

Check list:

Your pull request:

• targets the development branch
• uses the 999-SNAPSHOT version of Quarkus
• has tests (mvn clean test)
• works in native (mvn clean package -Pnative)
• has integration/native tests (mvn clean verify -Pnative)
• makes sure the associated guide must not be updated
• links the guide update pull request (if needed)
• updates or creates the README.md file (with build and run instructions)
• for new quickstart, is located in the directory component-quickstart
• for new quickstart, is added to the root pom.xml and README.md

Guide PR is at quarkusio/quarkus#38373

[quarkus-bot]

Failing Jobs - Building 6934905

Status	Name	Step	Failures	Logs	Raw logs	Build scan
✖	Build - JDK 17	Build with Maven	Failures	Logs	Raw logs	🚧

Failures

⚙️ Build - JDK 17 #

- Failing: security-webauthn-quickstart security-webauthn-reactive-quickstart 

📦 security-webauthn-quickstart

✖ Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.11.0:testCompile (default-testCompile) on project security-webauthn-quickstart: Compilation failure

📦 security-webauthn-reactive-quickstart

✖ Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.11.0:testCompile (default-testCompile) on project security-webauthn-reactive-quickstart: Compilation failure

[FroMage]

Yeah, this depends on quarkusio/quarkus#38373

[FroMage]

I've merged the related quarkus changes. Let's merge this too, see what happens.