Rename "Readme Link" to "Repo Link" in project model

Author: samdev-7

app/models/project.rb

@@ -98,7 +98,7 @@ def self.airtable_sync_field_mappings
       "Is Deleted" => :is_deleted,
       "Needs Funding" => :needs_funding,
       "Print Legion" => :print_legion,
-      "Readme Link" => :readme_link,
+      "Repo Link" => :repo_link,
       "Review Status" => :review_status,
       "Tier" => :tier,
       "Title" => :title,