build(deps): update sphinx requirement from <6.0,>5.0 to >5.0,<7.0 (#332)

Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> Co-authored-by: Jirka Borovec <6035284+Borda@users.noreply.github.com>

Author: dependabot[bot]

_requirements/docs.txt

@@ -1,4 +1,4 @@
-sphinx >5.0, <6.0
+sphinx >5.0, <7.0
 myst-parser >=0.18.1, <3.0.0
 nbsphinx >=0.8.5, <0.10
 pandoc >=1.0, <=2.3