chore: add flavor to pepr build task (#238)

## Description
Use the registry1 pepr controller image when creating a registry1
flavored uds package.

> Warning
> Iron Bank stays at least a few days behind on releasing 
> the latest version of pepr.  So pepr is currently at `0.27.0`,
> but the latest IB image version is `v0.26.2`


> Note
> Wanted to do an options `input` but didn't have a clean way to
> run the conditional check for setting the image at the top level 
> instead of in tasks that call `pepr-build`

## Related Issue

Resolves #222 

## Type of change

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [x] Other (security config, docs update, etc)

## Checklist before merging

- [ ] Test, docs, adr added or updated as needed
- [x] [Contributor Guide
Steps](https://github.com/defenseunicorns/uds-template-capability/blob/main/CONTRIBUTING.md)(https://github.com/defenseunicorns/uds-template-capability/blob/main/CONTRIBUTING.md#submitting-a-pull-request)
followed

renovate.json

@@ -84,7 +84,7 @@
     {
       "fileMatch": ["\\.*\\.ya?ml$"],
       "matchStrings": [
-        "# renovate: datasource=docker( versioning=(?<versioning>.*?))?\n\\s*-\\s+(?<depName>[^:]+):(?<currentValue>.*)"
+        "# renovate: datasource=docker( versioning=(?<versioning>.*?))?\n\\s+.+:(?<depName>[^:]+):(?<currentValue>.*)"
       ],
       "datasourceTemplate": "docker"
     },
@@ -238,7 +238,7 @@
       "pinDigests": true
     },
     {
-      "matchFileNames": ["package.json", "package-lock.json"],
+      "matchFileNames": ["package.json", "package-lock.json", "tasks/create.yaml"],
       "groupName": "pepr",
       "commitMessageTopic": "pepr"
     }

tasks/create.yaml

@@ -2,6 +2,10 @@ variables:
   - name: FLAVOR
     default: upstream
 
+  - name: REGISTRY1_PEPR_IMAGE
+    # renovate: datasource=docker versioning=semver
+    default: registry1.dso.mil/ironbank/opensource/defenseunicorns/pepr/controller:v0.27.0
+
 tasks:
   - name: standard-package
     description: "Create the UDS Core Zarf Package"
@@ -47,6 +51,7 @@ tasks:
     actions:
       - description: "Build the UDS Core Pepr Module"
         cmd: |
+          CUSTOM_PEPR_IMAGE=$( [ "${FLAVOR}" = "registry1" ] && echo "--custom-image ${REGISTRY1_PEPR_IMAGE}" ) || CUSTOM_PEPR_IMAGE=""
           rm -fr dist
           npm ci
-          npx pepr build
+          npx pepr build $CUSTOM_PEPR_IMAGE