[github] update action and use major version

[VoltrexMaster]

Summary

• Update the actions/download-artifact action to version 3.
• Use the major version of an action instead of specifying the minor or patch versions.

[tstellar]

LGTM. Thank You.

.github/workflows/llvm-project-tests.yml

steps:
         uses: llvm/actions/install-ninja@main
       # actions/checkout deletes any existing files in the new git directory,
       # so this needs to either run before ccache-action or it has to use
       # clean: false.
       - uses: actions/checkout@v3
         with:
           fetch-depth: 250
       - name: Setup ccache
-        uses: hendrikmuhs/ccache-action@v1.2
+        uses: hendrikmuhs/ccache-action@v1
         with:
           # A full build of llvm, clang, lld, and lldb takes about 250MB
           # of ccache space. There's not much reason to have more than this,
           # because we usually won't need to save cache entries from older
           # builds.  Also, there is an overall 10GB cache limit, and each
           # run creates a new cache entry so we want to ensure that we have
           # enough cache space for all the tests to run at once and still
           # fit under the 10 GB limit.

.github/workflows/release-tasks.yml

steps:
           ./llvm/utils/release/./github-upload-release.py --token ${{ github.token }} --release ${{ steps.validate-tag.outputs.release-version }} create
 
       - name: Build Documentation
         run: |
           ./llvm/utils/release/build-docs.sh -release ${{ steps.validate-tag.outputs.release-version }}
           ./llvm/utils/release/github-upload-release.py --token ${{ github.token }} --release ${{ steps.validate-tag.outputs.release-version }} upload --files *doxygen*.tar.xz
 
       - name: Create Release Notes Artifact
-        uses: actions/download-artifact@v1
+        uses: actions/download-artifact@v3
         with:
           name: release-notes
           path: docs-build/html-export/
 
       - name: Clone www-releases
         if: ${{ !contains(steps.validate-tag.outputs.release-version, 'rc') }}
         uses: actions/checkout@v3
         with: