change button enclosing <p> to <div>

docs/common/footer.php

@@ -75,7 +75,7 @@ $quote_author_arr = [
 						" by php/".phpversion()." ".$_SERVER["SERVER_SOFTWARE"];
 					?>
 				</p>
-				<p>
+				<div>
 					<span>
 						<a href="https://validator.w3.org/check?uri=http://www.zdenekborovec-dev.cz">
 							<img style="border:0;width:88px;height:31px"
@@ -94,7 +94,7 @@ $quote_author_arr = [
 								src="https://assets.zdenekborovec.cz/upload/8502f9f1d8b27fcc926545884d657bdd/eb2c7faf2d434c46494bc66ed8fe6bad/6dd6d70868b91b6b10418c1fadc13f68.gif"
 								alt="Viewable with any browser"></a>
 					</span>
-				</p>
+				</div>
 			</div>
 		</main>
 	</body>