Update test triggers on README

Signed-off-by: Huy Mai <[email protected]>

README.md

@@ -43,7 +43,7 @@ development. Here are the tests which run on different branches in BMO:
 **E2E tests:**
 
 - **/test metal3-bmo-e2e-test-pull** runs required BMO e2e tests on your PR.
-  Works for main and release-0.5 branches.
+  Works for main, release-0.5, release-0.6 and release-0.8 branches.
 - **/test metal3-bmo-e2e-test-optional-pull** runs optional BMO e2e tests on
   your PR. These are under active development currently.
 
@@ -56,6 +56,15 @@ For more details on the e2e tests, see [test/e2e/README.md](test/e2e/README.md).
 - **/test metal3-ubuntu-e2e-integration-test-main** runs ansible integration
   tests with CAPM3 main branch and BMO **main** branch on Ubuntu
 
+**Release-0.8 branch:**
+
+- **/test metal3-centos-e2e-integration-test-release-1-8** runs CAPM3 e2e
+  integration tests with CAPM3 release-1.8 branch and BMO **release-0.8**
+  branch on Centos
+- **/test metal3-ubuntu-e2e-integration-test-release-1-7** runs ansible
+  integration tests with CAPM3 release-1.8 branch and BMO **release-0.8**
+  branch on Ubuntu
+
 **Release-0.6 branch:**
 
 - **/test metal3-centos-e2e-integration-test-release-1-7** runs CAPM3 e2e
@@ -74,15 +83,6 @@ For more details on the e2e tests, see [test/e2e/README.md](test/e2e/README.md).
   integration tests with CAPM3 release-1.6 branch and BMO **release-0.5**
   branch on Ubuntu
 
-**Release-0.4 branch:**
-
-- **/test metal3-centos-e2e-integration-test-release-1-5** runs CAPM3 e2e
-  integration tests with CAPM3 release-1.5 branch and BMO **release-0.4**
-  branch on Centos
-- **/test metal3-ubuntu-e2e-integration-test-release-1-5** runs ansible
-  integration tests with CAPM3 release-1.5 branch and BMO **release-0.4**
-  branch on Ubuntu
-
 ### Important Notes
 
 Whenever there is a change in `config/` directory, please remember to run the