fix unchecked cast warnings in build

[gdams]

Warning:  /home/runner/work/adoptium-updater-parent/adoptium-api-v3-updater/src/test/kotlin/net/adoptium/api/GraphQLGitHubReleaseClientTest.kt: (77, 98) Unchecked cast: GHReleaseResult to F
Warning:  /home/runner/work/adoptium-updater-parent/adoptium-api-v3-updater/src/test/kotlin/net/adoptium/api/GraphQLGitHubReleaseClientTest.kt: (102, 88) Unchecked cast: QueryData to F
Warning:  /home/runner/work/adoptium-updater-parent/adoptium-api-v3-updater/src/test/kotlin/net/adoptium/api/GraphQLGitHubReleaseClientTest.kt: (146, 60) Unchecked cast: QuerySummaryData to F
Warning:  /home/runner/work/adoptium-updater-parent/adoptium-api-v3-updater/src/test/kotlin/net/adoptium/api/GraphQLGitHubReleaseClientTest.kt: (171, 57) Unchecked cast: Any? to Map<String, String>
Warning:  /home/runner/work/adoptium-updater-parent/adoptium-api-v3-updater/src/test/kotlin/net/adoptium/api/GraphQLGitHubReleaseClientTest.kt: (179, 88) Unchecked cast: QueryData to F

Checklist

• You added tests to cover the change
• mvn clean install build and test completes
• You changed or added to the documentation