[#4439] fix: add **/*.out in list of exclusions (#4443)

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### What changes were proposed in this pull request?

Add `**/*.out` to the list of exclusions will skip the licence check on
the *.out file.

### Why are the changes needed?

Fix: #4439

### Does this PR introduce _any_ user-facing change?

No

### How was this patch tested?

No

Co-authored-by: Saker <[email protected]>

build.gradle.kts

@@ -466,6 +466,7 @@ tasks.rat {
     "dev/docker/**/*.conf",
     "dev/docker/kerberos-hive/kadm5.acl",
     "**/*.log",
+    "**/*.out",
     "**/testsets",
     "**/licenses/*.txt",
     "**/licenses/*.md",