Fixes to `updatepetjson` and `ecatheaderupdate`#369

bendhouseart merged 3 commits intoopenneuropet:mainopenneuropet/PET2BIDS:mainfrom

pwighton:20251119-updatepetjson-and-ecatheaderupdate-fixpwighton/pet2bids:20251119-updatepetjson-and-ecatheaderupdate-fixCopy head branch name to clipboard