Bump the all group across 1 directory with 5 updates

Bumps the all group with 5 updates in the / directory:

| Package | From | To |
| --- | --- | --- |
| [actions/checkout](https://github.com/actions/checkout) | `4` | `6` |
| [actions/cache](https://github.com/actions/cache) | `4` | `5` |
| [actions/upload-artifact](https://github.com/actions/upload-artifact) | `4` | `6` |
| [actions/download-artifact](https://github.com/actions/download-artifact) | `4` | `7` |
| [peter-evans/create-pull-request](https://github.com/peter-evans/create-pull-request) | `7` | `8` |



Updates `actions/checkout` from 4 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v6)

Updates `actions/cache` from 4 to 5
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v4...v5)

Updates `actions/upload-artifact` from 4 to 6
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v6)

Updates `actions/download-artifact` from 4 to 7
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v4...v7)

Updates `peter-evans/create-pull-request` from 7 to 8
- [Release notes](https://github.com/peter-evans/create-pull-request/releases)
- [Commits](peter-evans/create-pull-request@v7...v8)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: all
- dependency-name: actions/cache
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: all
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: all
- dependency-name: actions/download-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: all
- dependency-name: peter-evans/create-pull-request
  dependency-version: '8'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: all
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
 
       # Checkout Silicon (note: all checkouts delete the contents of their working directory)
       - name: Checkout Silicon
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           submodules: true
 
@@ -45,7 +45,7 @@ jobs:
         # Cache path is relative to the directory in which sbt is invoked
         run: echo "SBT_OPTS=-Dsbt.global.base=sbt-cache/.sbtboot -Dsbt.boot.directory=sbt-cache/.boot -Dsbt.ivy.home=sbt-cache/.ivy" >> $GITHUB_ENV
       - name: Cache sbt
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             sbt-cache/.sbtboot
@@ -68,7 +68,7 @@ jobs:
           cp target/scala-2.13/silicon.jar .
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: test-and-assemble
           path: |
@@ -85,12 +85,12 @@ jobs:
     steps:
       # Checkout Silicon (deletes content of working directory)
       - name: Checkout Silicon
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           submodules: true
 
       - name: Download artifacts from job test-and-assemble
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v7
         with:
           name: test-and-assemble
 

.github/workflows/update-submodules.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out the repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           submodules: true
 
@@ -41,7 +41,7 @@ jobs:
 
       - name: Open a pull request
         id: pr
-        uses: peter-evans/create-pull-request@v7
+        uses: peter-evans/create-pull-request@v8
         if: (env.PREV_SILVER_REF != env.CUR_SILVER_REF)
         with:
           # Use viper-admin's token to workaround a restriction of GitHub.