gmoccapy_3_5_0: update release notes, set version number #917

Job	Run time
package-arch (debian:bookworm)	24m 19s
htmldocs	24m 47s
package-arch (debian:sid)	24m 46s
cppcheck	5m 22s
package-indep (debian:bookworm)	33m 39s
rip-and-test	21m 40s
package-indep (debian:sid)	39m 46s
rip-and-test-clang	22m 43s
	3h 17m 2s

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