fix: preserve single quotes in blog post titles

The title extraction regex was removing everything from the first quote
to end of line, cutting off titles containing apostrophes like "It's".
Now only strips trailing quotes at the end of the line.

Author: CalvinAllen

.github/workflows/detect-new-blog-post.yml

@@ -126,7 +126,7 @@ jobs:
           fi
 
           # Extract title from frontmatter
-          TITLE=$(sed -n '/^---$/,/^---$/p' "$NEW_POST" | grep -E '^title:' | sed "s/^title:[[:space:]]*['\"]*//" | sed "s/['\"].*$//")
+          TITLE=$(sed -n '/^---$/,/^---$/p' "$NEW_POST" | grep -E '^title:' | sed "s/^title:[[:space:]]*['\"]*//" | sed "s/['\"][[:space:]]*$//")
 
           if [ -z "$TITLE" ]; then
             echo "Could not extract title"