Update How-to-contribute.qmd

Learn/Guides/How-to-contribute.qmd

@@ -130,6 +130,8 @@ If you are adding an external resource, please start with one of the relevant te
 
 - ["Learn" resource](https://github.com/UW-Madison-DataScience/ML-X-Nexus/blob/main/Contributor-templates/template_learn.qmd): workshop, book, guide, video lecture, etc.
 - [Application - talk/video](https://github.com/UW-Madison-DataScience/ML-X-Nexus/blob/main/Contributor-templates/template_application-talk.qmd)
+- [Application - blog](https://github.com/UW-Madison-DataScience/ML-X-Nexus/blob/main/Contributor-templates/template_application-blog.qmd)
+
 
 #### Orginal content
 To write a post, there are many options: Write it using [quarto](https://www.quarto.org), [rmarkdown](https://rmarkdown.rstudio.com/), or [jupyter](https://jupyter.org/). The post could be a new file in the appropriate folder (Resources, ML-stories, or EDA), or a named folder with an `index.[ipynb|qmd|rmd|md]` extension. In any case, the header of the post needs to be a `yaml` section with the fields: