Update parameter name casing

Author: micjustus-nc

.azuredevops/pipelines/cd-infrastructure-dev-core.yaml

@@ -18,10 +18,10 @@ resources:
       endpoint: NHSDigital
 
 parameters:
-  - name: image-hash
+  - name: imageHash
     type: string
     default: ''
-  - name: registry-host
+  - name: registryHost
     type: string
 
 variables:
@@ -51,8 +51,8 @@ stages:
           - checkout: dtos-devops-templates
           - template: .azuredevops/templates/steps/tf_plan.yaml@dtos-devops-templates
             parameters:
-              image-hash: ${{ parameters.image-hash }}
-              registry-host: ${{ parameters.registry-host }}
+              image-hash: ${{ parameters.imageHash }}
+              registry-host: ${{ parameters.registryHost }}
 
   - stage: terraform_apply
     displayName: Terraform Apply