speeches: replace suspended unification.net drop-cap images with plain capitals

The illuminated initial-capital GIFs were hotlinked from www.unification.net,
which is now a suspended domain, so they rendered as broken images at the start
of paragraphs across 11 archived speeches. Each <img> carried the correct letter
in its alt attribute (and was the first letter of the word), so replacing the
tag with that letter restores the text with no broken image.

83 tags across 11 files; no remaining references to unification.net/images.

content/speeches/1996/in-search-of-the-origin-of-the-universe.md

@@ -16,7 +16,7 @@ Farewell Banquet</p>
 <p>August 1, 1996<br />
 Washington DC<br />
 Translator &#8212; Peter Kim</h3>
-<p><img decoding="async" src="https://www.unification.net/images/cap_D.gif" alt="D" height="34" align="left" border="0" />istinguished Guests, Ladies and Gentlemen.</p>
+<p>Distinguished Guests, Ladies and Gentlemen.</p>
 <p>With the end of the Cold War, new hope for peace and justice has spread rapidly across the globe. Leaders unable or unwilling to acknowledge the new international realities are being swept away by the tidal wave of change.</p>
 <p>As we stand at the threshold of the new millennium, I believe it is time to review our traditional patterns of thinking and boldly seize these new opportunities. Thus it is my great honor to share with you my life-long advocacy for world peace and true family values.</p>
 <p>In this world there are two kinds of human beings: men and women. Can they decide to exchange positions? Was your birth as male or female based upon your personal desire? Or were you born that way irrespective of your personal preference? The sex that we are given is an absolute and is not a matter of choice. We did not think it nor did we want it, but without knowing the cause, result, or process of our birth, we were born a certain way.</p>