DOCSP-23226 v4.2 build errors (#1251)

* DOCSP-23226 Build cleanup

* DOCSP-23226 Fixes setFeatureCompatibility version for arbiters

* DOCSP-22725 BACKPORT (#1241)

* DOCSP-23226 Fixes per Ian

Co-authored-by: Dave Cuthbert <[email protected]>

Author: kennethdyer

source/reference/command/setFeatureCompatibilityVersion.txt

@@ -10,6 +10,10 @@ setFeatureCompatibilityVersion
    :depth: 1
    :class: singlecol
 
+.. |newversion| replace:: 4.2
+
+.. |oldversion| replace:: 4.0
+
 Definition
 ----------
 
@@ -146,8 +150,8 @@ Feature Compatibility in Arbiters
 
 .. include:: /includes/arbiter-fcv.rst
 
-For example, an arbiter in a MongoDB 5.0 cluster, has an FCV
-value of 4.4.
+For example, an arbiter in a MongoDB |newversion| cluster, has an FCV
+value of |oldversion|.
 
 Examples
 --------