feat: add info for release cycle and breaking changes

[FionnD]

Context: Following discussions with team leads / product / CTO. The following changes were agreed upon and need to be communicated to the team/community.

[codecov]

Codecov Report

Merging #2303 (4f7daca) into master (084c430) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #2303   +/-   ##
=======================================
  Coverage   88.74%   88.74%           
=======================================
  Files         211      211           
  Lines       11453    11453           
=======================================
  Hits        10164    10164           
  Misses       1289     1289           

Flag	Coverage Δ
daemon	51.06% <100.00%> (ø)
jina	89.10% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
jina/__init__.py	74.41% <100.00%> (ø)

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[github-actions]

Latency summary

Current PR yields:

• 😶 index QPS at 960, delta to last 3 avg.: -5%
• 🐢🐢 query QPS at 16, delta to last 3 avg.: -10%

Breakdown

Version	Index QPS	Query QPS
current	960	16
1.1.5	1000	18
1.1.4	1042	17

Backed by latency-tracking. Further commits will update this comment.