Revert "VIA-598 Adjust check for version number exists in deploy job"

This reverts commit 3e2e35d.

Author: donna-belsey-nhs

.github/workflows/cicd-3-deploy.yaml

@@ -41,7 +41,7 @@ jobs:
       - name: "Check version exists"
         shell: bash
         run: |
-          RELEASE_VERSION=$(git tag | grep -oFx "${{inputs.version-to-deploy}}")
+          RELEASE_VERSION=$(git tag | grep -oP "^${{inputs.version-to-deploy}}$")
           if [[ -z "$RELEASE_VERSION" ]]; then
             echo "Invalid version number ${{inputs.version-to-deploy}} does not exist."
             exit 1