Bump magefile/mage-action from 1 to 3 (#227)

Bumps [magefile/mage-action](https://github.com/magefile/mage-action) from 1 to 3.
- [Release notes](https://github.com/magefile/mage-action/releases)
- [Commits](magefile/mage-action@v1...v3)

---
updated-dependencies:
- dependency-name: magefile/mage-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/ci.yml

@@ -62,14 +62,14 @@ jobs:
 
       - name: Test backend
         if: steps.check-for-backend.outputs.has-backend == 'true'
-        uses: magefile/mage-action@v1
+        uses: magefile/mage-action@v3
         with:
           version: latest
           args: coverage
 
       - name: Build backend
         if: steps.check-for-backend.outputs.has-backend == 'true'
-        uses: magefile/mage-action@v1
+        uses: magefile/mage-action@v3
         with:
           version: latest
           args: -v buildAll

.github/workflows/release.yml

@@ -60,14 +60,14 @@ jobs:
 
       - name: Test backend
         if: steps.check-for-backend.outputs.has-backend == 'true'
-        uses: magefile/mage-action@v1
+        uses: magefile/mage-action@v3
         with:
           version: latest
           args: coverage
 
       - name: Build backend
         if: steps.check-for-backend.outputs.has-backend == 'true'
-        uses: magefile/mage-action@v1
+        uses: magefile/mage-action@v3
         with:
           version: latest
           args: -v buildAll