Push to GHCR, hopefully

Signed-off-by: Nic Cope <nicc@rk0n.org>

Author: negz

.github/workflows/ci.yml

@@ -20,17 +20,12 @@ env:
 
   # These environment variables are important to the Crossplane CLI install.sh
   # script. They determine what version it installs.
-  XP_CHANNEL: master   # TODO(negz): Pin to stable once v1.14 is released.
-  XP_VERSION: current  # TODO(negz): Pin to a version once v1.14 is released.
-
-  # This CI job will automatically push new builds to xpkg.upbound.io if the
-  # XPKG_ACCESS_ID and XPKG_TOKEN secrets are set in the GitHub respository (or
-  # organization) settings. Create a token at https://accounts.upbound.io.
-  XPKG_ACCESS_ID: ${{ secrets.XPKG_ACCESS_ID }}
+  XP_CHANNEL: stable
+  XP_VERSION: v1.20.0
 
   # The package to push, without a version tag. The default matches GitHub. For
-  # example xpkg.upbound.io/crossplane/function-template-go.
-  XPKG: xpkg.upbound.io/${{ github.repository}}
+  # example xpkg.crossplane.io/crossplane/function-template-go.
+  XPKG: xpkg.crossplane.io/${{ github.repository}}
 
   # The package version to push. The default is 0.0.0-gitsha.
   XPKG_VERSION: ${{ inputs.version }}
@@ -148,13 +143,13 @@ jobs:
       - name: Setup the Crossplane CLI
         run: "curl -sL https://raw.githubusercontent.com/crossplane/crossplane/master/install.sh | sh"
 
-      - name: Login to Upbound
+      - name: Login to GitHub Container Registry
         uses: docker/login-action@v3
         if: env.XPKG_ACCESS_ID != ''
         with:
-          registry: xpkg.upbound.io
-          username: ${{ secrets.XPKG_ACCESS_ID }}
-          password: ${{ secrets.XPKG_TOKEN }}
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
 
       # If a version wasn't explicitly passed as a workflow_dispatch input we
       # default to version v0.0.0-<git-commit-date>-<git-short-sha>, for example
@@ -164,7 +159,7 @@ jobs:
         if: env.XPKG_VERSION == ''
         run: echo "XPKG_VERSION=v0.0.0-$(date -d@$(git show -s --format=%ct) +%Y%m%d%H%M%S)-$(git rev-parse --short=12 HEAD)" >> $GITHUB_ENV
 
-      - name: Push Multi-Platform Package to Upbound
+      - name: Push Multi-Platform Package to GitHub Container Registry
         if: env.XPKG_ACCESS_ID != ''
         # XPKG repo name can't contain uppercase characters like UpboundCare, we need to lowercase if the GithubOrg contains them.
         # See https://github.com/orgs/community/discussions/25768#discussioncomment-8057564 for XPKG@L lowercase explanation