Fix Oracle DevService JDBC pattern

Update Oracle JDBC URL example in docs

Author: gastaldi

docs/src/main/asciidoc/datasource.adoc

@@ -470,7 +470,7 @@ quarkus.datasource."pg".jdbc.url=jdbc:postgresql:///your_database
 
 quarkus.datasource."oracle".db-kind=oracle
 quarkus.datasource."oracle".active=false
-quarkus.datasource."oracle".jdbc.url=jdbc:oracle:///your_database
+quarkus.datasource."oracle".jdbc.url=jdbc:oracle:thin:@localhost:1521/your_database
 ----
 
 Setting `quarkus.datasource."pg".active=true` xref:config-reference.adoc#configuration-sources[at runtime] makes only the PostgreSQL datasource available.

extensions/devservices/oracle/src/main/java/io/quarkus/devservices/oracle/deployment/OracleDatasourceServiceConfigurator.java

@@ -36,7 +36,7 @@ public RunningDevServicesDatasource composeRunningService(ContainerAddress conta
     }
 
     public String getJdbcUrl(ContainerAddress containerAddress, String databaseName) {
-        return "jdbc:%s://@%s:%d/%s%s".formatted(
+        return "jdbc:%s:@%s:%d/%s%s".formatted(
                 getJdbcPrefix(),
                 containerAddress.getHost(),
                 containerAddress.getPort(),