[LTS Update installation] Converted links to absolute

Author: mnocon

docs/update_and_migration/from_4.6/update_from_4.6.md

@@ -440,7 +440,7 @@ To use the [latest features](ibexa_dxp_v4.6.md) added to them, update them separ
 
     ### Discounts [[% include 'snippets/lts-update_badge.md' %]] [[% include 'snippets/commerce_badge.md' %]]
 
-    To install the [Discounts feature](discounts_guide.md), see the [installation instructions](install_discounts.md).
+    To install the [Discounts feature](discounts_guide.md), see the [installation instructions](https://doc.ibexa.co/en/4.6/discounts/install_discounts/).
 
     If you're already using it, run the following command to get the latest version of this feature:
 
@@ -635,7 +635,7 @@ To use the [latest features](ibexa_dxp_v4.6.md) added to them, update them separ
 
     ### AI Actions [[% include 'snippets/lts-update_badge.md' %]]
 
-    To install the [AI actions feature](ai_actions_guide.md), see the [installation instructions](install_ai_actions.md).
+    To install the [AI actions feature](ai_actions_guide.md), see the [installation instructions](https://doc.ibexa.co/en/4.6/ai_actions/install_ai_actions/).
 
     If you're already using it, run the following command to get the latest version of this feature:
 
@@ -647,7 +647,7 @@ To use the [latest features](ibexa_dxp_v4.6.md) added to them, update them separ
 
     ### Date and time attribute [[% include 'snippets/lts-update_badge.md' %]]
 
-    To install the [Date and time attribute](date_and_time.md), see the [installation instructions](date_and_time.md#installation).
+    To install the [Date and time attribute](date_and_time.md), see the [installation instructions](https://doc.ibexa.co/en/4.6/pim/attributes/date_and_time/#installation).
 
     If you're already using it, run the following command to get the latest version of this feature:
 
@@ -659,7 +659,7 @@ To use the [latest features](ibexa_dxp_v4.6.md) added to them, update them separ
 
     ### Symbol attribute [[% include 'snippets/lts-update_badge.md' %]]
 
-    To install the [Symbol attribute](symbol_attribute_type.md), see the [installation instructions](symbol_attribute_type.md#installation).
+    To install the [Symbol attribute](symbol_attribute_type.md), see the [installation instructions](https://doc.ibexa.co/en/4.6/pim/attributes/symbol_attribute_type/#installation).
 
     If you're already using it, run the following command to get the latest version of this feature: