exclude rst files from merge conflict check

Headings are marked via '======'

Author: finn-rudolph

.pre-commit-config.yaml

@@ -59,6 +59,7 @@ repos:
         entry: pixi run check-merge-conflict --assume-in-merge
         language: system
         types: [text]
+        exclude: ".rst$"
       # typos
       - id: typos
         name: typos