doc: unify End-of-Life marker

PR-URL: #19942
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>

doc/api/deprecations.md

@@ -131,7 +131,7 @@ to the `constants` property exposed by the relevant module. For instance,
 <a id="DEP0009"></a>
 ### DEP0009: crypto.pbkdf2 without digest
 
-Type: End-of-life
+Type: End-of-Life
 
 Use of the [`crypto.pbkdf2()`][] API without specifying a digest was deprecated
 in Node.js 6.0 because the method defaulted to using the non-recommended
@@ -383,7 +383,7 @@ instead.
 <a id="DEP0041"></a>
 ### DEP0041: NODE\_REPL\_HISTORY\_FILE environment variable
 
-Type: End-of-life
+Type: End-of-Life
 
 The `NODE_REPL_HISTORY_FILE` environment variable was removed. Please use
 `NODE_REPL_HISTORY` instead.