Update hugo-solstice-theme

Signed-off-by: Eric Poirier <eric.poirier@eclipse-foundation.org>

package.json

@@ -21,7 +21,7 @@
     "install": "NODE_ENV=production npm run production && npm run fetch_project"
   },
   "dependencies": {
-    "eclipsefdn-hugo-solstice-theme": "0.0.172",
+    "eclipsefdn-hugo-solstice-theme": "0.0.173",
     "js-yaml": "^3.13.1",
     "json-minify": "^1.0.0"
   },