use search input type for documentation search

- see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/search

CHANGELOG.txt

@@ -26,6 +26,7 @@ Changelog
  * Avoid assuming an integer PK named 'id' on multiple upload views (Matt Westcott)
  * Add a toggle to collapse/expand all page panels at once (Helen Chapman)
  * Improve the GitHub Workflows (CI) security (Alex (sashashura))
+ * Use `search` type input in documentation search (LB (Ben) Johnston)
  * Fix: Prevent `PageQuerySet.not_public` from returning all pages when no page restrictions exist (Mehrdad Moradizadeh)
  * Fix: Ensure that duplicate block ids are unique when duplicating stream blocks in the page editor (Joshua Munn)
  * Fix: Revise colour usage so that privacy & locked indicators can be seen in Windows High Contrast mode (LB (Ben Johnston))

docs/_templates/searchbox.html

@@ -5,7 +5,7 @@
                 <div class="input-group-prepend">
                     <div class="input-group-text border-right-0 bg-white py-3 pl-3 pr-2"><span class="fas fa-search"></span></div>
                 </div>
-                <input class="form-control py-3 pr-3 pl-3 h-100 border-left-0" type="text" name="q" placeholder="Search" aria-label="Search" id="searchinput" />
+                <input class="form-control py-3 pr-3 pl-3 h-100 border-left-0" type="search" name="q" placeholder="Search" aria-label="Search" id="searchinput" />
             </div>
             <input type="submit" style="visibility:hidden;position:absolute;display:block;">
         </form>

docs/releases/4.1.md

@@ -38,6 +38,7 @@ Scheduled publishing settings can now be found within the Status side panel of t
  * Avoid assuming an integer PK named 'id' on multiple upload views (Matt Westcott)
  * Add a toggle to collapse/expand all page panels at once (Helen Chapman)
  * Improve the GitHub Workflows (CI) security (Alex (sashashura))
+ * Use `search` type input in documentation search (LB (Ben) Johnston)
 
 ### Bug fixes