Bump version of RHDH to 1.7 in main; remove RHTAP version = 1.3 as it's not used anywhere (#1220)

Bump version of RHDH to 1.7 in main; remove RHTAP version = 1.3 as it's not used anywhere

Author: nickboldt

artifacts/attributes.adoc

@@ -12,10 +12,10 @@
 :product-very-short: RHDH
 :product-local: Red Hat Developer Hub Local
 :product-local-very-short: RHDH Local
-:product-version: 1.6
-:product-bundle-version: 1.6.0
-:product-chart-version: 1.6.0
-:product-backstage-version: 1.36.1
+: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-custom-resource-type: Backstage
 :rhdeveloper-name: Red Hat Developer
@@ -53,7 +53,6 @@
 :keycloak-version: 26.0
 
 // RHTAP information
-:rhtap-version: 1.3
 :rhtap-brand-name: Red Hat Trusted Application Pipeline
 :rhtap-very-short: RHTAP