chore: version bump for 1.8 in main branch (#1433)

Signed-off-by: Nick Boldt <[email protected]>

Author: nickboldt

artifacts/attributes.adoc

@@ -12,11 +12,11 @@
 :product-very-short: RHDH
 :product-local: Red Hat Developer Hub Local
 :product-local-very-short: RHDH Local
-:product-version: 1.7
-:product-bundle-version: 1.7.0
-:product-chart-version: 1.7.0
-:product-backstage-version: 1.39.1
-:product-version-next: 1.7
+:product-version: 1.8
+:product-bundle-version: 1.8.0
+:product-chart-version: 1.8.0
+:product-backstage-version: 1.42.5
+:product-version-next: 1.9
 :product-custom-resource-type: Backstage
 :product-docs-url: https://docs.redhat.com/en/documentation/red_hat_developer_hub
 :product-docs-link: link:{product-docs-url}/{product-version}