Fix broken test and badge (#418)

* use ubuntu 22.04 for cpp test

* fix broken badge

Author: venkatsridhar95

.github/workflows/gv-oracle.yml

@@ -7,7 +7,7 @@ on:
     branches: [ main ]
 jobs:
   odbTest:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     services:
       odb3:

README.md

@@ -1,5 +1,6 @@
-[![Go Build](https://github.com/paypal/hera/actions/workflows/go.yml/badge.svg?branch=master)](https://github.com/paypal/hera/actions/workflows/go.yml)
-[![Java CI with Maven](https://github.com/paypal/hera/actions/workflows/jdbc-ci-maven.yml/badge.svg?branch=master)](https://github.com/paypal/hera/actions/workflows/jdbc-ci-maven.yml)
+[![Go Build](https://github.com/paypal/hera/actions/workflows/go.yml/badge.svg?branch=main)](https://github.com/paypal/hera/actions/workflows/go.yml)
+[![Java CI with Maven](https://github.com/paypal/hera/actions/workflows/jdbc-ci-maven.yml/badge.svg?branch=main)](https://github.com/paypal/hera/actions/workflows/jdbc-ci-maven.yml)
+[![Functional Tests](https://github.com/paypal/hera/actions/workflows/manual-ft.yml/badge.svg?branch=main)](https://github.com/paypal/hera/actions/workflows/manual-ft.yml)
 [![License](http://img.shields.io/:license-Apache%202-blue.svg)](http://www.apache.org/licenses/LICENSE-2.0.txt)
 
 <img src="docs/hera.png" height="240" width="340">