add QR code for slides link

Author: jerith666

index.html

@@ -27,10 +27,16 @@
 			</section>
 
 			<section>
-				<p style="font-size:200%">Hashing &<br />Content Addressability</p>
-				<p>Foundations of Git, Bitcoin, & Nix</p>
-				<p style="font-size:75%">Matt McHenry</p>
-				<p style="font-size:75%">https://matt.mchenryfamily.org/hash-talk</p>
+				<div style="display: flex; flex-direction: row;">
+					<div style="flex: 5;">
+						<p style="font-size:200%">Hashing &<br />Content Addressability</p>
+						<p>Foundations of Git, Bitcoin, & Nix</p>
+						<p style="font-size:75%">Matt McHenry</p>
+						<p style="font-size:75%">https://matt.mchenryfamily.org/hash-talk</p>
+					</div>
+					<div style="flex: 1; margin-top: 25vh;">
+						<img src="slides-link-qr.png" />
+					</div>
 			</section>
 			<section>
 				<ul>
@@ -801,8 +807,14 @@
 			</section>
 
 			<section>
-				<p>Thank You!</p>
-				<p>https://matt.mchenryfamily.org/hash-talk</p>
+				<div style="display: flex; flex-direction: row;">
+					<div style="flex: 5;">
+						<p>Thank You!</p>
+						<p>https://matt.mchenryfamily.org/hash-talk</p>
+					</div>
+					<div style="flex: 1">
+						<img src="slides-link-qr.png" />
+					</div>
 			</section>
 
 			<!--section data-auto-animate data-auto-animate-restart>