Add terms (#4439)

Signed-off-by: natebower <102320899+natebower@users.noreply.github.com>

TERMS.md

@@ -89,6 +89,10 @@ Lower case scaling, auto scaling, and automatic scaling (but not autoscaling) ar
 
 Do not use hyphenated auto-scaling as a compound modifier. Instead, use scaling (for example, scaling policy), or scalable (for example, scalable target or scalable, load-balanced environment).
 
+**AWS Signature Version 4**
+
+Use on first appearance. On subsequent appearances, *Signature Version 4* may be used. Only use *SigV4* when space is limited.
+
 ## B
 
 **below**
@@ -303,6 +307,8 @@ Do not use. This term is unnecessarily violent for technical documentation. Use
 
 **hostname**
 
+**Hugging Face**
+
 ## I
 
 **i.e.**
@@ -333,6 +339,8 @@ A collection of JSON documents. Non-hardcoded references to *indices* should be
 
 **Index State Management (ISM)**
 
+**inline**
+
 **install in, on**
 
 install in a folder, directory, or path; install on a disk, drive, or instance.
@@ -542,6 +550,8 @@ Correct: an on-premises solution
 
 Incorrect: an on-premise solution, an on-prem solution
 
+**pretrain**
+
 **primary shard**
 
 A Lucene instance that contains data for some or all of an index.