DOC: Add missing periods to the ArviZ community page (#2426)

* DOC: Add missing periods in community.md

* DOC: Add missing periods in external_resources.md

doc/source/community.md

@@ -12,9 +12,9 @@ We do this by:
 
 * Creating and maintaining the ArviZ library with functions for posterior analysis, data storage,
   sample diagnostics, model checking, and comparison.
-* Creating social infrastructure through a welcoming and diverse community
-* Making the right data, tools and best practices more discoverable
-* Promoting advocacy for a culture of principled iterative modeling based on the Bayesian Workflow
+* Creating social infrastructure through a welcoming and diverse community.
+* Making the right data, tools and best practices more discoverable.
+* Promoting advocacy for a culture of principled iterative modeling based on the Bayesian Workflow.
 
 This page aims to gather resources related to Bayesian modeling and ArviZ from a variety of
 sources to work towards the 2nd and 3rd bullet points.
@@ -105,7 +105,7 @@ let us know!
 
 ## Blogs and example compilations
 If you have a blog that has 2 or more posts tagged as "ArviZ", you can submit
-a pull request to add your blog to this list
+a pull request to add your blog to this list.
 
 ```{include} external_resources.md
 ```

doc/source/external_resources.md

@@ -32,7 +32,7 @@ Examples authored by Stan developers and expert users.
 Bambi is a high-level Bayesian model-building interface written in Python,
 designed to make it extremely easy to fit mixed-effects models.
 +++
-Tutorials and book translations maintained by the Bambi team
+Tutorials and book translations maintained by the Bambi team.
 ::::
 
 ::::{grid-item-card}
@@ -45,7 +45,7 @@ Blog mostly on statistics, diversity and open source. I also use the blog as a p
 to test new pages for ArviZ docs.
 +++
 Oriol Abril Pla is an ArviZ core contributor pursuing his PhD
-at Helsinki University
+at Helsinki University.
 ::::
 :::::