Add section for gradle plugin to issue template
**Environment**: <!-- OS, Maven, and other relevant environment information -->
-**`jib-maven-plugin` Configuration:**
+**`jib-maven-plugin` Configuration**: <!-- Delete this section if not used -->
```xml
PASTE YOUR pom.xml CONFIGURATION HERE
```
+**`jib-gradle-plugin` Configuration**: <!-- Delete this section if not used -->
+```groovy
+PASTE YOUR build.gradle CONFIGURATION HERE
+```
+
**Log output**: <!-- If applicable, provide relevant log output -->
**Additional Information**: <!-- Any additional information that may be helpful -->
