Update GCMD keyword link in editor

Fixes #2284

src/js/templates/metadata/metadataOverview.html

@@ -27,7 +27,7 @@ <h5>Keywords <i class="required-icon hidden" data-category="keywordSets"></i></h
 		Add keywords that accurately categorize these data. Add one keyword per line.
 	</p>
 	<p class="subtle">
-		Keyword suggestions for the Earth Sciences can be found on the <a href="http://gcmd.arcticlcc.org/" target="_blank">NASA Global Change Master Directory (GCMD)</a>, particularly under Earth Science > Biosphere.
+		Keyword suggestions for the Earth Sciences can be found on the <a href="https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/Earth%20Science/" target="_blank">NASA Global Change Master Directory (GCMD)</a>, particularly under Earth Science > Biosphere.
 	</p>
 	<p class="notification" data-category="keywordSets"></p>