Clarify assumption for SOC bridge (#1976)

* Clarify assumption for SOC bridge

* Update src/Bridges/Constraint/bridges/soc_rsoc.jl

Co-authored-by: Oscar Dowson <[email protected]>

Author: blegat

src/Bridges/Constraint/bridges/soc_rsoc.jl

@@ -13,7 +13,7 @@
 
 ## Assumptions
 
-  * `SOCtoRSOCBridge` assumes that ``|x| \\ge 1``.
+  * `SOCtoRSOCBridge` assumes that the length of `x` is at least one.
 
 ## Source node