chore: tagRelease.sh: bump to 1.5.1 in release-1.5 branch (#1027)

Signed-off-by: rhdh-bot service account <[email protected]>

Author: rhdh-bot

artifacts/attributes.adoc

@@ -11,8 +11,8 @@
 :product-short: Developer Hub
 :product-very-short: RHDH
 :product-version: 1.5
-:product-bundle-version: 1.5.0
-:product-chart-version: 1.5.0
+:product-bundle-version: 1.5.1
+:product-chart-version: 1.5.1
 :product-backstage-version: 1.35.0
 :product-custom-resource-type: Backstage
 :rhdeveloper-name: Red Hat Developer