ci: when updating readme, use original author

Signed-off-by: Tom Hayward <thayward@infoblox.com>

Author: kd7lxl

.github/workflows/lint-test.yml

@@ -27,10 +27,11 @@ jobs:
           if git diff --quiet -- README.md; then
             echo "updated=false" >> "$GITHUB_OUTPUT"
           else
-            git config user.name "github-actions[bot]"
-            git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+            git config user.name "$(git log -1 --format='%an')"
+            git config user.email "$(git log -1 --format='%ae')"
             git add README.md
-            git commit -m "Auto-update README.md"
+            git commit -s -m "Auto-update README.md" \
+              -m "Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>"
             git push
             echo "updated=true" >> "$GITHUB_OUTPUT"
           fi