docs: revise URL structure (libraries) #1459

Job	Run time
Compile Benchmarks	5m 20s
Docs	6m 17s
Checks	4m 33s
Compile and test (2.13)	7m 35s
Compile and test (3.3)	7m 45s
Gradle tests	11m 10s
Maven tests	8m 52s
sbt scripted tests (gen-scala-server, 2.13)	11m 32s
sbt scripted tests (gen-java, 2.13)	6m 57s
sbt scripted tests (scala-2_13, 2.13)	6m 41s
sbt scripted tests (scala3, 3.3)	6m 21s
	1h 23m 3s

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