Bump wiiu-env/devkitppc from 20230417 to 20230621

Bumps wiiu-env/devkitppc from 20230417 to 20230621.

---
updated-dependencies:
- dependency-name: wiiu-env/devkitppc
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/dependabot.yml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: "docker"
+    directory: "/"
+    schedule:
+      interval: "daily"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-22.04
     needs: clang-format
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: build binary
       run: |
         docker build . -t builder

Dockerfile

@@ -1,3 +1,3 @@
-FROM ghcr.io/wiiu-env/devkitppc:20230417
+FROM ghcr.io/wiiu-env/devkitppc:20230621
 
 WORKDIR project