Fix typos (#4612)

Fix misspellings of "occurred".

config/locales/js-en.yml

@@ -66,7 +66,7 @@ en:
     description_selected_columns: "Selected Columns"
     description_subwork_package: "Child of work package #%{id}"
     error:
-      internal: "An internal error has occcurred."
+      internal: "An internal error has occurred."
     filter:
       description:
         text_open_filter: "Open this filter with 'ALT' and arrow keys."
@@ -209,7 +209,7 @@ en:
 
     watchers:
       label_loading: loading watchers...
-      label_error_loading: An error occured while loading the watchers
+      label_error_loading: An error occurred while loading the watchers
       label_search_watchers: Search watchers
       label_add: Add watchers
       label_discard: Discard selection
@@ -293,7 +293,7 @@ en:
       change: "Change in planning"
       due_date: "Due date"
       empty: "(empty)"
-      error: "An error has occured."
+      error: "An error has occurred."
       errors:
         not_implemented: "The timeline could not be rendered because it uses a feature that is not yet implemented."
         report_comparison: "The timeline could not render the configured comparisons. Please check the appropriate section in the configuration, resetting it can help solve this problem."
@@ -363,7 +363,7 @@ en:
     work_packages:
       button_clear: "Clear"
       comment_added: "The comment was successfully added."
-      comment_send_failed: "An error has occured. Could not submit the comment."
+      comment_send_failed: "An error has occurred. Could not submit the comment."
       comment_updated: "The comment was successfully updated."
       confirm_edit_cancel: "Are you sure you want to cancel editing the work package?"
       description_filter: "Filter"
@@ -374,7 +374,7 @@ en:
         edit_prohibited: "Editing %{attribute} is blocked for this work package. Either this attribute is derived from relations (e.g, children) or otherwise not configurable."
         format:
           date: "%{attribute} is no valid date - YYYY-MM-DD expected."
-        general: "An error has occured."
+        general: "An error has occurred."
       edit_attribute: "%{attribute} - Edit"
       key_value: "%{key}: %{value}"
       label_enable_multi_select: "Enable multiselect"