CHANGELOG: add go 1.22.8 entry for 3.4 and 3.5

[ivanvc]

Add an entry regarding using Go 1.22.8 for releases 3.4 and 3.5.

Part of: #18665

Please read https://github.com/etcd-io/etcd/blob/main/CONTRIBUTING.md#contribution-flow.

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.74%. Comparing base (54db7f0) to head (e6c7449).

❗ Current head e6c7449 differs from pull request most recent head 482eac3

Please upload reports for the commit 482eac3 to get more accurate results.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

see 25 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #18743      +/-   ##
==========================================
- Coverage   68.79%   68.74%   -0.06%     
==========================================
  Files         420      420              
  Lines       35493    35493              
==========================================
- Hits        24419    24400      -19     
- Misses       9648     9656       +8     
- Partials     1426     1437      +11     

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 54db7f0...482eac3. Read the comment docs.

[jmhbnz]

LGTM - Thanks @ivanvc

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ahrtr, ivanvc, jmhbnz

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [ahrtr,jmhbnz]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment