Upgrade ghaction-import-gpg to v4

Signed-off-by: KeisukeYamashita <[email protected]>

Author: KeisukeYamashita

.github/workflows/release-provider.yml

@@ -49,9 +49,9 @@ jobs:
             ${{ runner.os }}-go-
       - name: Import GPG key
         id: import_gpg
-        uses: crazy-max/ghaction-import-gpg@v3
+        uses: crazy-max/ghaction-import-gpg@v4
         with:
-          gpg-private-key: ${{ secrets.GPG_PRIVATE_KEY }}
+          gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
           passphrase: ${{ secrets.PASSPHRASE }}
       - name: Release provider
         uses: goreleaser/[email protected]