1.5 EOL (#5380)

## What are you changing in this pull request and why?

Marks 1.5 as end of life

## Checklist
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website/snippets/core-versions-table.md

@@ -2,10 +2,10 @@
 
 |                      dbt Core                                 | Initial release |      Support level and end date      |
 |:-------------------------------------------------------------:|:---------------:|:-------------------------------------:|
-| [**v1.8**](/docs/dbt-versions/core-upgrade/upgrading-to-v1.8) | April 2024    | Beta                              |
-| [**v1.7**](/docs/dbt-versions/core-upgrade/upgrading-to-v1.7) | Nov 2, 2023   | <b>Active &mdash; Nov 1, 2024</b> | 
+| [**v1.8**](/docs/dbt-versions/core-upgrade/upgrading-to-v1.8) | May     2024  | Beta                              |
+| [**v1.7**](/docs/dbt-versions/core-upgrade/upgrading-to-v1.7) | Nov 2,  2023  | <b>Active &mdash; Nov 1, 2024</b> | 
 | [**v1.6**](/docs/dbt-versions/core-upgrade/upgrading-to-v1.6) | Jul 31, 2023  | Critical &mdash; Jul 30, 2024 |  
-| [**v1.5**](/docs/dbt-versions/core-upgrade/upgrading-to-v1.5) | Apr 27, 2023  | Critical &mdash; Apr 27, 2024 |
+| [**v1.5**](/docs/dbt-versions/core-upgrade/upgrading-to-v1.5) | Apr 27, 2023  | End of Life* ⚠️ |
 | [**v1.4**](/docs/dbt-versions/core-upgrade/upgrading-to-v1.4) | Jan 25, 2023  | End of Life* ⚠️ | 
 | [**v1.3**](/docs/dbt-versions/core-upgrade/upgrading-to-v1.3) | Oct 12, 2022  | End of Life* ⚠️ |
 | [**v1.2**](/docs/dbt-versions/core-upgrade/upgrading-to-v1.2) | Jul 26, 2022  | End of Life* ⚠️ |