Update docker/login-action action to v4

Author: renovate[bot]

.github/workflows/ci.yml

@@ -148,7 +148,7 @@ jobs:
         run: "curl -sL https://raw.githubusercontent.com/crossplane/crossplane/master/install.sh | sh"
 
       - name: Login to Upbound
-        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3
+        uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4
         if: env.XPKG_ACCESS_ID != ''
         with:
           registry: xpkg.upbound.io