Unable to attach another PDF apart from resume.pdf / Also how to fix the title problem

Hello, https://confident-dubinsky-3db436.netlify.app/ I have successfully hosted on netfily, however, when I give this link to anyone on the WhatsApp or similar apps, I get the preview as shown in the picture. so how can i fix this " [Your Name here] | Developer "

When I add another button for a different pdf file, the second button still opens the resume.pdf only even though I have updated the button and provided the new pdf link in href as shown in the picture.

<span class="d-flex mt-3">
              <a
              rel="noreferrer"
              target="_blank"
              class="cta-btn cta-btn--resume"
              href="src/assets/another.pdf"
              >
              View another file
            </a>
          </span>