fix(azure): use correct ip for APIM in prod (#1036)

<!--- Provide a general summary of your changes in the Title above -->

## Description
Adding the IP for the APIM in production as IP-restriction for the apps.
<!--- Describe your changes in detail -->

## Related Issue(s)

- #845 

## Verification

- [ ] **Your** code builds clean without any errors or warnings
- [ ] Manual testing done (required)
- [ ] Relevant automated test added (if you find this hard, leave it and
we'll help out)

## Documentation

- [ ] Documentation is updated (either in `docs`-directory, Altinnpedia
or a separate linked PR in
[altinn-studio-docs.](https://github.com/Altinn/altinn-studio-docs), if
applicable)

.azure/applications/graphql/prod.bicepparam

@@ -2,8 +2,7 @@ using './main.bicep'
 
 param environment = 'prod'
 param location = 'norwayeast'
-// todo: replace with prod ip
-param apimIp = '51.13.86.131'
+param apimIp = '51.120.88.54'
 param imageTag = readEnvironmentVariable('IMAGE_TAG')
 
 // secrets

.azure/applications/web-api-eu/prod.bicepparam

@@ -2,8 +2,7 @@ using './main.bicep'
 
 param environment = 'prod'
 param location = 'norwayeast'
-// todo: replace with prod ip
-param apimIp = '51.13.86.131'
+param apimIp = '51.120.88.54'
 param imageTag = readEnvironmentVariable('IMAGE_TAG')
 
 // secrets

.azure/applications/web-api-so/prod.bicepparam

@@ -2,8 +2,7 @@ using './main.bicep'
 
 param environment = 'prod'
 param location = 'norwayeast'
-// todo: replace with prod ip
-param apimIp = '51.13.86.131'
+param apimIp = '51.120.88.54'
 param imageTag = readEnvironmentVariable('IMAGE_TAG')
 
 // secrets