fix variable names to match taskfile expectations

- change channel-create to use RELEASE_CHANNEL parameter
- pass RELEASE_CHANNEL as task parameter instead of env var
- ensure all task calls use correct variable names from taskfile

Author: adamancini

.github/workflows/wg-easy-pr-validation.yaml

@@ -201,7 +201,7 @@ jobs:
         run: |
           BRANCH_NAME="${{ github.head_ref || github.ref_name }}"
           CHANNEL_NAME=$(echo "$BRANCH_NAME" | tr '[:upper:]' '[:lower:]')
-          task channel-create CHANNEL_NAME="$CHANNEL_NAME"
+          task channel-create RELEASE_CHANNEL="$CHANNEL_NAME"
         timeout-minutes: 5
         env:
           REPLICATED_API_TOKEN: ${{ secrets.WG_EASY_REPLICATED_API_TOKEN }}
@@ -211,12 +211,11 @@ jobs:
         run: |
           BRANCH_NAME="${{ github.head_ref || github.ref_name }}"
           CHANNEL_NAME=$(echo "$BRANCH_NAME" | tr '[:upper:]' '[:lower:]')
-          task release-create
+          task release-create RELEASE_CHANNEL="$CHANNEL_NAME"
         timeout-minutes: 15
         env:
           REPLICATED_API_TOKEN: ${{ secrets.WG_EASY_REPLICATED_API_TOKEN }}
           REPLICATED_APP: ${{ secrets.WG_EASY_REPLICATED_APP }}
-          CHANNEL: $CHANNEL_NAME
 
   create-customer:
     runs-on: ubuntu-22.04