 gradle quarkusBuild  has error : SRCFG00035: Failed to load resource

Since upgrading from to 1.13.x, run below command
```
./gradlew  quarkusBuild -Dquarkus.package.type=uber-jar  -Dorg.gradle.jvmargs=-Xmx256m
```
Gradle made a error: SRCFG00035: Failed to load resource, full stacktrace is:
```
> Task :processResources

> Task :classes
start copy some files...

> Task :inspectClassesForKotlinIC
> Task :jar

> Task :quarkusBuild
building quarkus jar

> Task :quarkusBuild FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':quarkusBuild'.
> java.lang.IllegalStateException: SRCFG00035: Failed to load resource

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
```
My system jdk version :
```
openjdk 11.0.10 2021-01-19
OpenJDK Runtime Environment 18.9 (build 11.0.10+9)
OpenJDK 64-Bit Server VM 18.9 (build 11.0.10+9, mixed mode, sharing)
```
when I use `adoptjdk15-openj9` or downgrade quarkus version to `1.12.2.Final`, it' all fine.

diff --git a/extensions/config-yaml/runtime/src/main/java/io/quarkus/config/yaml/runtime/ApplicationYamlConfigSourceLoader.java b/extensions/config-yaml/runtime/src/main/java/io/quarkus/config/yaml/runtime/ApplicationYamlConfigSourceLoader.java
index 2f063642c30..9badce01571 100644
--- a/extensions/config-yaml/runtime/src/main/java/io/quarkus/config/yaml/runtime/ApplicationYamlConfigSourceLoader.java
+++ b/extensions/config-yaml/runtime/src/main/java/io/quarkus/config/yaml/runtime/ApplicationYamlConfigSourceLoader.java
@@ -3,6 +3,7 @@
 import java.io.IOException;
 import java.net.URI;
 import java.net.URL;
+import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -45,8 +46,12 @@ public static class InFileSystem extends ApplicationYamlConfigSourceLoader imple
         @Override
         public List<ConfigSource> getConfigSources(final ClassLoader classLoader) {
             List<ConfigSource> configSources = new ArrayList<>();
-            configSources.addAll(loadConfigSources("config/application.yaml", 265, classLoader));
-            configSources.addAll(loadConfigSources("config/application.yml", 265, classLoader));
+            configSources.addAll(loadConfigSources(
+                    Paths.get(System.getProperty("user.dir"), "config", "application.yaml").toUri().toString(), 265,
+                    classLoader));
+            configSources.addAll(
+                    loadConfigSources(Paths.get(System.getProperty("user.dir"), "config", "application.yml").toUri().toString(),
+                            265, classLoader));
             return configSources;
         }
 
['extensions/config-yaml/runtime/src/main/java/io/quarkus/config/yaml/runtime/ApplicationYamlConfigSourceLoader.java']