Update issue templates

.github/ISSUE_TEMPLATE/measurement-template.md

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+---
+name: Measurement template
+about: Templates for EFO measurement terms - e.g. for GWAS
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+## Preferred term label (Mandatory)
+
+(e.g., Asplenia)
+
+## Synonyms
+
+(e.g., Absent spleen)
+
+## Textual definition
+
+the definition should be understandable even for non-specialists. Include a PubMed ID to refer to any relevant article that provides additional information about the suggested term.
+
+## Suggested parent term
+
+Please look in the hierarchy in a browser such as [OLS](http://www.ebi.ac.uk/ols/ontologies/efo)
+
+## What is being measured? (optional)
+
+e.g. what [anatomical structure](https://www.ebi.ac.uk/ols/ontologies/uberon), [chemical compound](https://www.ebi.ac.uk/ols/ontologies/chebi), gene product, protein complex is being measured?
+
+## In what anatomical structure or [organism substance](https://www.ebi.ac.uk/ols/ontologies/uberon/terms?iri=http%3A%2F%2Fpurl.obolibrary.org%2Fobo%2FUBERON_0000463&viewMode=All&siblings=false) (e.g. urine, blood)  is it being measured?
+
+
+## Biomarker for 
+
+If the measurement is used a biomarker for some disease, phenotype or process or please record this here.
+
+## Attribution
+
+If you would like a nanoattribution, please indicate your ORCID id