Merge branch 'mr-origin-367' into 'annegrat.daujeumont-develop-patch-22486'

add header

See merge request annegrat.daujeumont/howto-cards!4

external/lab-hsa/spill-bsc/spill-bsc.md

+---
+layout: page
+permalink: /external/lab-hsa/spill-bsc/
+shortcut: lab-hsa:spill-bsc
+redirect_from:
+  - /cards/lab-hsa:spill-bsc
+  - /external/cards/lab-hsa:spill-bsc
+  - /cards/lab:spill-bsc
+  - /external/cards/lab:spill-bsc
+---
 # How to deal with a spill in a BSC
 
 ## Minor spill in a BSC (few milliliters of hazardous biological material inside a BSC)