Decrease footer font size

Change-Id: I86e0c3ca5f041b61b344435195b74e42587c73e7
diff --git a/inst/reveal.js-5.1.0/css/theme/source/ids.scss b/inst/reveal.js-5.1.0/css/theme/source/ids.scss
index d3008a5..28dcec0 100644
--- a/inst/reveal.js-5.1.0/css/theme/source/ids.scss
+++ b/inst/reveal.js-5.1.0/css/theme/source/ids.scss
@@ -102,7 +102,7 @@
   height: 100%;
   line-height: 100%;
   z-index: -20;
-  font-size: 2vh;
+  font-size: 1.8vh;
   font-family: "Fira Sans Condensed", "Fira Sans", "Roboto Condensed", "League Gothic", Impact, sans-serif;
   display: inline-block;
   display: table-cell;