enhance(frontend): 個別お知らせページではmetaタグを出力するように (#14902)

* enhance(frontend): 個別お知らせページではmetaタグを出力するように

* Update Changelog

packages/backend/src/server/web/views/base.pug

@@ -2,6 +2,7 @@ block vars
 
 block loadClientEntry
 	- const entry = config.frontendEntry;
+	- const baseUrl = config.url;
 
 doctype html
 
@@ -32,7 +33,7 @@ html
 		link(rel='icon' href= icon || '/favicon.ico')
 		link(rel='apple-touch-icon' href= appleTouchIcon || '/apple-touch-icon.png')
 		link(rel='manifest' href='/manifest.json')
-		link(rel='search' type='application/opensearchdescription+xml' title=(title || "Misskey") href=`${url}/opensearch.xml`)
+		link(rel='search' type='application/opensearchdescription+xml' title=(title || "Misskey") href=`${baseUrl}/opensearch.xml`)
 		link(rel='prefetch' href=serverErrorImageUrl)
 		link(rel='prefetch' href=infoImageUrl)
 		link(rel='prefetch' href=notFoundImageUrl)