increment_version.sh: also exclude .md changes from changelog

Change-Id: I20454009a9a078239f279170618debbabbec5d84

increment_version.sh

@@ -155,6 +155,7 @@ git_changelog() {
         | grep -v "Automatic SchildiChat string correction" \
         | grep -v 'merge_helpers\|README\|increment_version' \
         | grep -v "\\.sh" \
+        | grep -v "\\.md" \
         | grep -v "Update string correction" \
         | grep -v "Added translation using Weblate" \
         | grep -v "Translated using Weblate" \