Revert downgrade sphinxcontrib-needs

We can now use the latest version as lfdocs-conf is now
fixed [1].

[1] https://gerrit.linuxfoundation.org/infra/c/releng/docs-conf/+/70536

Issue-ID: DOC-782
Change-Id: Iaffaf0e8dd32a7b7ec994fb88f2c035097d0cca2
Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
1 file changed