Add missing Fedora repo update deps

.github/workflows/fedora-30.yml

@@ -66,7 +66,7 @@ jobs:
     steps:
     - name: Install dependencies
       run: |
-        dnf install -y git
+        dnf install -y git findutils
 
     - name: Download artifacts
       uses: actions/download-artifact@v1

.github/workflows/fedora-31.yml

@@ -66,7 +66,7 @@ jobs:
     steps:
     - name: Install dependencies
       run: |
-        dnf install -y git
+        dnf install -y git findutils
 
     - name: Download artifacts
       uses: actions/download-artifact@v1