Fix doc anchor (#4376)

* Fix doc anchor
The "search an article" link lead to a dead anchor
https://freshrss.github.io/FreshRSS/en/users/02_First_steps.html

* Fix wording

docs/en/users/02_First_steps.md

@@ -21,7 +21,7 @@ Now that you’ve mastered basic use, it’s time to configure FreshRSS to impro
 * [Choose the reading options](05_Configuration.md#reading-options)
 * [Refresh feeds](03_Main_view.md#refreshing-feeds)
 * [Filter articles](03_Main_view.md#filtering-articles) for a fast access to a selection
-* [Search an article](03_Main_view.md#searching-articles) published some time ago
+* [search for an article](03_Main_view.md#with-the-search-field) published some time ago
 * [Access your feeds on a mobile device](06_Mobile_access.md)
 * [Add some extensions](https://github.com/FreshRSS/Extensions)
 * [Frequently asked questions](07_Frequently_Asked_Questions.md)

docs/i18n/freshrss.fr.po

@@ -4073,7 +4073,7 @@ msgstr ""
 #. type: Bullet: '* '
 #: en/./users/02_First_steps.md:27
 msgid ""
-"[Search an article](03_Main_view.md#searching-articles) published some time "
+"[search for an article](03_Main_view.md#with-the-search-field) published some time "
 "ago"
 msgstr ""
 "[Retrouvez un article](03_Main_view.md#rechercher-des-articles) qui a été "

docs/i18n/templates/freshrss.pot

@@ -3298,7 +3298,7 @@ msgstr ""
 #. type: Bullet: '* '
 #: en/./users/02_First_steps.md:27
 msgid ""
-"[Search an article](03_Main_view.md#searching-articles) published some time "
+"[search for an article](03_Main_view.md#with-the-search-field) published some time "
 "ago"
 msgstr ""