chore(changelog): update changelog for gRPC TLS seclevel change

[Water-Melon]

Update changelog for gRPC TLS seclevel change. The original PR is #12548.

Set security level of gRPC's TLS to 0 when ssl_cipher_suite is set to old.

KAG-3259

[ADD-SP]

Please let the message start with a verb, otherwise I'm having trouble understanding what this PR has done.

[team-gateway-bot]

Successfully created cherry-pick PR for master:

• https://github.com/kong/kong-ee/pull/8313

[team-gateway-bot]

Cherry-pick failed for master, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally.

git remote add upstream https://github.com/kong/kong-ee
git fetch upstream master
git worktree add -d .worktree/cherry-pick-12613-to-master-to-upstream upstream/master
cd .worktree/cherry-pick-12613-to-master-to-upstream
git checkout -b cherry-pick-12613-to-master-to-upstream
ancref=$(git merge-base 31926752d792f92718f04b8f424ef2b7f6dd8080 c2745d3c30e2ae1587c3ed27d34831faa066a212)
git cherry-pick -x $ancref..c2745d3c30e2ae1587c3ed27d34831faa066a212

[team-gateway-bot]

Cherry-pick failed for master, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally.

git remote add upstream https://github.com/kong/kong-ee
git fetch upstream master
git worktree add -d .worktree/cherry-pick-12613-to-master-to-upstream upstream/master
cd .worktree/cherry-pick-12613-to-master-to-upstream
git checkout -b cherry-pick-12613-to-master-to-upstream
ancref=$(git merge-base 31926752d792f92718f04b8f424ef2b7f6dd8080 c2745d3c30e2ae1587c3ed27d34831faa066a212)
git cherry-pick -x $ancref..c2745d3c30e2ae1587c3ed27d34831faa066a212

[team-gateway-bot]

Cherry-pick failed for master, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally.

git remote add upstream https://github.com/kong/kong-ee
git fetch upstream master
git worktree add -d .worktree/cherry-pick-12613-to-master-to-upstream upstream/master
cd .worktree/cherry-pick-12613-to-master-to-upstream
git checkout -b cherry-pick-12613-to-master-to-upstream
ancref=$(git merge-base 31926752d792f92718f04b8f424ef2b7f6dd8080 c2745d3c30e2ae1587c3ed27d34831faa066a212)
git cherry-pick -x $ancref..c2745d3c30e2ae1587c3ed27d34831faa066a212