make hyperlink text informative

For accessibility, hyperlink text should be informative. This PR replaces the use of "here" with more informative text including additional words from the existing text.

Author: ErinBecker

episodes/introduction.md

@@ -115,7 +115,7 @@ This is a bit subjective but it comes down to whether or not you have something
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-Rapid Usability Testing is one of many approaches in UXR. There are a variety of methods which may be better suited for different scenarios, circumstances, and/or phases in the product lifecycle. For example, user discovery sessions may be a good fit for when a general concept is known but an associated tool or service does not yet exist (more on the discovery phase [here](https://www.nngroup.com/articles/discovery-study-guide/); and [affinity diagramming](https://www.nngroup.com/articles/affinity-diagram/) is an approach that is particularly well-suited for the qualitative analysis of user feedback with smaller sample sizes. [This guide from 18F](https://web.archive.org/web/20250222140849/https://guides.18f.gov/methods/), the former GSA digital services team, helps lay out the many options available to you. 
+Rapid Usability Testing is one of many approaches in UXR. There are a variety of methods which may be better suited for different scenarios, circumstances, and/or phases in the product lifecycle. For example, user discovery sessions may be a good fit for when a general concept is known but an associated tool or service does not yet exist (more on the [discovery phase here](https://www.nngroup.com/articles/discovery-study-guide/); and [affinity diagramming](https://www.nngroup.com/articles/affinity-diagram/) is an approach that is particularly well-suited for the qualitative analysis of user feedback with smaller sample sizes. [This guide from 18F](https://web.archive.org/web/20250222140849/https://guides.18f.gov/methods/), the former GSA digital services team, helps lay out the many options available to you. 
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