Remove spaces between key and value for DevServices properties in DevUI

[geoand]

This makes it easier to copy and paste these as system properties

[quarkus-bot]

Failing Jobs - Building c451567

Status	Name	Step	Failures	Logs	Raw logs
✔️	JVM Tests - JDK 11
✖	JVM Tests - JDK 11 Windows	Build	Failures	Logs	Raw logs
✔️	JVM Tests - JDK 17
✖	JVM Tests - JDK 18	Build	Failures	Logs	Raw logs

Full information is available in the Build summary check run.

Failures

⚙️ JVM Tests - JDK 11 Windows #

- Failing: extensions/vertx-http/deployment 
! Skipped: extensions/agroal/deployment extensions/amazon-lambda-http/deployment extensions/amazon-lambda-rest/deployment and 282 more

📦 extensions/vertx-http/deployment

✖ io.quarkus.vertx.http.http2.Http2Test.testHttp2EnabledSsl line 57 - More details - Source on GitHub

java.util.concurrent.ExecutionException: javax.net.ssl.SSLHandshakeException: Failed to create SSL connection
	at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:395)
	at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1999)

---

⚙️ JVM Tests - JDK 18 #

- Failing: extensions/grpc/deployment 
! Skipped: extensions/opentelemetry/opentelemetry/deployment integration-tests/devmode integration-tests/grpc-external-proto-test and 17 more

📦 extensions/grpc/deployment

✖ io.quarkus.grpc.server.devmode.GrpcDevModeTest.testEchoStreamReload - More details - Source on GitHub

java.util.concurrent.RejectedExecutionException
	at org.jboss.threads.RejectingExecutor.execute(RejectingExecutor.java:38)
	at org.jboss.threads.EnhancedQueueExecutor.rejectShutdown(EnhancedQueueExecutor.java:2076)