Update language-support-policy.md

support for Node 12 ends end of year.

Author: lilyjma

articles/azure-functions/language-support-policy.md

@@ -32,6 +32,7 @@ There are few exceptions to the retirement policy outlined above. Here is a list
 
 |Language Versions                        |EOL Date         |Retirement Date|
 |-----------------------------------------|-----------------|----------------|
+|Node 12|30 Apr 2022|13 December 2022|
 |PowerShell Core 6| 4 September 2020|30 September 2022|
 |Python 3.6 |23 December 2021|30 September 2022|