build: License change date and sample bump for 2.5.2 #1558

Job	Run time
Checks	4m 49s
Compile Benchmarks	5m 19s
Compile and test (2.13)	8m 3s
Gradle tests	7m 3s
sbt scripted tests (gen-scala-server, 2.13)	11m 15s
Compile and test (3.3)	8m 24s
sbt scripted tests (gen-java, 2.13)	8m 37s
sbt scripted tests (scala-2_13, 2.13)	7m 35s
Maven tests	9m 0s
sbt scripted tests (scala3, 3.3)	7m 32s
	1h 17m 37s

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