SeanAverS

Add a new shoulder exercise

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Add a new shoulder exercise

Ruby On Rails: Update link text

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## Because Update link text for improved accessibility ## This PR - In the `Working with External APIs` lesson, update the link text on lines 9, 86, 92, 105, 130,...

chore: Change description for connecting projects to the goal

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Change description in #1207 for `connecting projects to the goal`