Skip template strings when verifying links (#456)

## Problem

We don't want the link checker to fail when trying to verify links like
`https://reddit.com/r/{x['subreddit']}/comments/{x['id']}`

## Solution

- Skip links that contain `{`.
- Modifying the regex match to exclude `{` will just match on the first
segment `https://reddit.com/r/` which is not what we want.

## Type of Change

- [x] Infrastructure change (CI configs, etc)

Author: jhamon

.github/actions/check-links/check-links.py

@@ -58,6 +58,9 @@
                 if any(ignore_link in link for ignore_link in ignore_links):
                     print(f"  ⏭️ {link}")
                     continue
+                if "{" in link: # template strings don't need to be checked
+                    print(f"  ⏭️ {link}")
+                    continue
                 if link in known_good_links:
                     good_links.add(link)
                     print(f"  ✅ {link}")