docs: fix link in guide (#17090)

Author: Borda

docs/source-pytorch/upgrade/migration_guide.rst

@@ -19,42 +19,42 @@ Particular versions
    :header: 1.9.x
    :description: Upgrade from 1.9.x series to the 2.0.
    :col_css: col-md-12
-   :button_link: 1_9.html
+   :button_link: from_1_9.html
    :height: 100
 
 .. displayitem::
    :header: 1.8.x
    :description: Upgrade from 1.8.x series to the 2.0.
    :col_css: col-md-12
-   :button_link: 1_8.html
+   :button_link: from_1_8.html
    :height: 100
 
 .. displayitem::
    :header: 1.7.x
    :description: Upgrade from 1.7.x series to the 2.0.
    :col_css: col-md-12
-   :button_link: 1_7.html
+   :button_link: from_1_7.html
    :height: 100
 
 .. displayitem::
    :header: 1.6.x
    :description: Upgrade from 1.6.x series to the 2.0.
    :col_css: col-md-12
-   :button_link: 1_6.html
+   :button_link: from_1_6.html
    :height: 100
 
 .. displayitem::
    :header: 1.5.x
    :description: Upgrade from 1.5.x series to the 2.0.
    :col_css: col-md-12
-   :button_link: 1_5.html
+   :button_link: from_1_5.html
    :height: 100
 
 .. displayitem::
    :header: 1.4.x
    :description: Upgrade from 1.4.x series to the 2.0.
    :col_css: col-md-12
-   :button_link: 1_4.html
+   :button_link: from_1_4.html
    :height: 100
 
 .. raw:: html