Count the terminal newline in the release-note size guard [skip ci]

The generator emits one newline after the captured body. Tighten both
comparisons so the complete output, including that byte, fits GitHub's
125000-character limit. No runtime or client inputs change.

Verified manual local renders:125000characters succeeds;125001 refuses
with no stdout. Actual0.10.2 output remains byte-identical at15414chars.
Bashsyntax, ShellCheck and the existing generator suite pass. Release
preflight versions/OHOS/feature-notes/contributor-credit all pass.1ac
validation was deliberately superseded before this source edit, with no
source drift or hosted failure claimed. No new tests/comments/publication.

Refs: CW-7462

scripts/release/generate-release-body.sh

@@ -185,11 +185,11 @@ EOF
 }
 
 body="$(render_body)"
-if (( ${#body} > 125000 )); then
+if (( ${#body} >= 125000 )); then
   details="The full notes exceed GitHub's release-description limit. Read the [complete changelog for ${tag}](https://github.com/codewhale-hq/CodeWhale/blob/${tag}/CHANGELOG.md)."
   body="$(render_body)"
 fi
-if (( ${#body} > 125000 )); then
+if (( ${#body} >= 125000 )); then
   echo "Release summary, installation instructions and contributor credits exceed GitHub's 125000-character limit." >&2
   exit 1
 fi