Add examples of compatible versions

[xuniq]

Connected with #2218

Product: Tarantool
Root document: where to add or update documentation
SME: @ Totktonada

Details

Compatibility guarantees

Backwards compatibility is guaranteed between all versions in the same :term:release series.
It is also appreciated but not guaranteed between different release series (major number changes). Example.
Pre-releases and releases of one release series are compatible in all
senses defined below (any release with any release):

• Pre-releases and releases of consequent series are compatible by data
  layout, binary protocol, and replication protocol. Example.

• No guarantees are given regarding compatibility between
  pre-releases/releases of non-consequent release series if the opposite
  is not stated in the :doc:release notes <notes>. Example.

• No guarantees are given regarding compatibility between alpha/beta
  versions and between alpha/beta and pre-release/release even within one series. Example.