minor fixes

- yaml description file had posterdown HTML for all three html options which made it hard to find the right one

- fixed some main findings formmating issues in posterdown_betterport

- added `middle_textalpha:` option to ensure `<sup>` emphasis text in main findings is the same text color as the rest
diff --git a/inst/rmarkdown/templates/posterdown_betterland/template.yaml b/inst/rmarkdown/templates/posterdown_betterland/template.yaml
index 9fc207e..b26e40b 100644
--- a/inst/rmarkdown/templates/posterdown_betterland/template.yaml
+++ b/inst/rmarkdown/templates/posterdown_betterland/template.yaml
@@ -1,4 +1,4 @@
-name: Posterdown HTML
+name: Posterdown Betterland
 description: >
- Template for creating R Markdown based PDF via HTML and CSS
+ Template for creating R Markdown based PDF via HTML, CSS and the Better Poster Style
 create_dir: true