Phillip Webb 5e028599f0 Change PDF rename logic
Rework the rename logic used to include the reference PDF to try
and workaround the following local build error:

	Encountered duplicate path "reference/pdf/spring-boot-reference.pdf"
	during copy operation configured with DuplicatesStrategy.FAIL

See gh-20829
2020-04-06 19:18:22 -07:00
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2020-04-06 19:18:22 -07:00
2020-04-06 19:18:22 -07:00