docs(github): use task list for new book data sources

.github/ISSUE_TEMPLATE/new-book-data.md

@@ -9,19 +9,27 @@ assignees: ''
 
 ## Sources
 
-> List here what is included in this part of the book to implement. E.g., for special abilities, you need to list every source of entries from the book. Example (in German):
->
-> - S. 133–150 (Berufsgeheimnisse)
+<!-- List here what is included in this part of the book to implement. E.g., for special abilities, you need to list every source of entries from the book. Use page ranges if entries span multiple pages. Example:
 
-- S. X (Section/Chapter Name)
+- [ ] S. 133 (Entry A)
+- [ ] S. 133–134 (Entry B)
 
+Alternatively, provide an overview of the different sections in the book where one or more relevant entries occur. Example (in German):
 
+- [ ] S. 133–150 (Berufsgeheimnisse)
+
+-->
+
+- [ ] S. X (Entry/Section/Chapter Name)
 
 ## Special Notes
 
-> List here any special hints to implement the sources listed above.
->
-> - …
+<!-- List here any special hints to implement the sources listed above. Example:
+
+- All entries are already present, only add source references
+- Pay attention to the layout of entry A, there is a gap that should not be in Optolith
+
+Replace the dash below this comment if there are any notes. -->
 
 —
 
@@ -29,8 +37,10 @@ assignees: ''
 
 ## Special Implementations
 
-> List here what cannot be solved only using the database. Example (in German):
->
-> - [ ] Voraussetzungen Vorliebe I-II
+<!-- List issues that track what cannot be solved only using the database. Example:
+
+- #123
+
+Replace the dash below this comment if there are any notes. -->
 
 —