doc: fix deprecation "End-of-Life" capitalization

Update the "End-of-Life" casing in the deprecation documentation
for consistency. Similar to nodejs#26251.

PR-URL: nodejs#33691
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

Author: cjihrig

doc/api/deprecations.md

@@ -494,7 +494,7 @@ changes:
     description: Runtime deprecation.
 -->
 
-Type: End-of-life
+Type: End-of-Life
 
 The `Server.connections` property was deprecated in Node.js v0.9.7 and has
 been removed. Please use the [`Server.getConnections()`][] method instead.
@@ -1446,7 +1446,7 @@ changes:
     description: Runtime deprecation.
 -->
 
-Type: End-of-life
+Type: End-of-Life
 
 `node debug` corresponds to the legacy CLI debugger which has been replaced with
 a V8-inspector based CLI debugger available through `node inspect`.