Update _pkgdown.yml (#1651)

* Update _pkgdown.yml

Tweak, so that rlang's site looks more like other tidyverse sites.
This puts news to the left of the search bar

* Use modern (more compact) pkgdown config.

Author: olivroy

_pkgdown.yml

@@ -13,8 +13,7 @@ template:
 
 navbar:
   structure:
-    left:  [reference, tidyeval, metaprog, errors]
-    right: [news, github]
+    left:  [reference, tidyeval, metaprog, errors, news]
   components:
     tidyeval:
       text: Tidy evaluation
@@ -78,24 +77,18 @@ navbar:
       - text: Customising condition messages
         href: reference/topic-condition-customisation.html
 
-    news:
-      text: News
-      menu:
-      - text: "Release notes"
-      - text: "Version 0.4.3"
-        href: https://www.tidyverse.org/blog/2020/02/glue-strings-and-tidy-eval/
-      - text: "Version 0.4.0"
-        href: https://www.tidyverse.org/articles/2019/06/rlang-0-4-0/
-      - text: "Version 0.3.1"
-        href: https://www.tidyverse.org/articles/2019/01/rlang-0-3-1/
-      - text: "Version 0.3.0"
-        href: https://www.tidyverse.org/articles/2018/10/rlang-0-3-0/
-      - text: "Version 0.2.0"
-        href: https://www.tidyverse.org/articles/2018/03/rlang-0.2.0/
-      - text: "------------------"
-      - text: "Changelog"
-        href: news/index.html
-
+news:
+  releases:
+  - text: "Version 0.4.3"
+    href: https://www.tidyverse.org/blog/2020/02/glue-strings-and-tidy-eval/
+  - text: "Version 0.4.0"
+    href: https://www.tidyverse.org/articles/2019/06/rlang-0-4-0/
+  - text: "Version 0.3.1"
+    href: https://www.tidyverse.org/articles/2019/01/rlang-0-3-1/
+  - text: "Version 0.3.0"
+    href: https://www.tidyverse.org/articles/2018/10/rlang-0-3-0/
+  - text: "Version 0.2.0"
+    href: https://www.tidyverse.org/articles/2018/03/rlang-0.2.0/
 
 reference:
   # NSE