Bump actions/checkout from 5 to 6 (#11)

Author: dependabot[bot]

.github/workflows/aur-update.yaml

@@ -9,7 +9,7 @@ jobs:
   update:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: "Get the latest release"
         id: latest_release

.github/workflows/cleanup.yml

@@ -6,7 +6,7 @@ jobs:
   cleanup:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Get previous release tag

.github/workflows/discord-release.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Github Releases To Discord
         uses: SethCohen/github-releases-to-discord@master
         with: