Increase template version number

Follow-up to the fix in the template.

templates/lib/dynatable.tex

@@ -1,14 +1,15 @@
 <?lsmb#   This is a comment block; it's ignored by the template engine.
 
-   Version:  1.2
-   Date:     2023-12-01
+   Version:  1.3
+   Date:     2024-08-20
    File:     dynatable.tex
    Set:      none; shared
 
 Template version numbers are explicitly not aligned across templates or
 releases. No explicit versioning was applied before 2021-01-04.
 
 Version   Changes
+1.3       Fix encoding of repeat-headers (regresses from template version 1.2)
 1.2       Encode data from the 'columns' input, because the caller stopped its
           encoding to fix GitHub issue #7739.
 1.1       Simplified version which also works without columns of pre-declared