👷 Exclude Gradle source scripts from dependency submission

This GitHub workflow now shouldn't trigger when changes were made to Gradle build scripts from sources, such as the `jvm.gradle.kts` file.
The following commit will test this behavior.

.github/workflows/dependency-submission.yml

@@ -4,6 +4,7 @@ on:
     branches: [ main ]
     paths:
       - '**.gradle.kts'
+      - '!**/src/**.gradle.kts'
       - .github/workflows/dependency-submission.yml
       - gradle/libs.versions.toml
       - yarn.lock