Limit flammenwehrfer's output length for github issues

Otherwise github sadly rejects the edit

flammenwehrfer.sh

@@ -87,6 +87,7 @@ fi
 echo "Test failed"
 echo -e "Output:\n$MJ_OUTPUT"
 
+MJ_OUTPUT="$(echo "$MJ_OUTPUT" | head -c 60000)"
 CODE_BLOCK_HEADER='```'
 BODY="$BODY\n\n----\n\n<details>\n<summary>mjtest output</summary>\n\n$CODE_BLOCK_HEADER\n$MJ_OUTPUT\n$CODE_BLOCK_HEADER\n\n</details>"
 BODY="$BODY\n\n----\n\n$CODE_BLOCK_HEADER\n$(fortune | cowsay -n)\n$CODE_BLOCK_HEADER"