github-actions: pin mage action and use fixed version

.github/workflows/bump-agent-versions.yml

@@ -50,9 +50,9 @@ jobs:
           git config --global user.name "github-actions[bot]"
 
       - name: Install mage
-        uses: magefile/mage-action@v3
+        uses: magefile/mage-action@6f50bbb8ea47d56e62dee92392788acbc8192d0b # v3.1.0
         with:
-          version: v1.13.0
+          version: v1.14.0
           install-only: true
 
       - name: Update versions

.github/workflows/bump-beats-version.yml

@@ -49,7 +49,7 @@ jobs:
     - name: Install mage
       uses: magefile/mage-action@6f50bbb8ea47d56e62dee92392788acbc8192d0b # v3.1.0
       with:
-        version: v1.13.0
+        version: v1.14.0
         install-only: true
 
     - name: Run Updatecli in Apply mode

.github/workflows/post-dependabot.yml

@@ -22,8 +22,10 @@ jobs:
         with:
           go-version-file: .go-version
 
-      - uses: magefile/mage-action@v3
+      - name: Install mage
+        uses: magefile/mage-action@6f50bbb8ea47d56e62dee92392788acbc8192d0b # v3.1.0
         with:
+          version: v1.14.0
           install-only: true
 
       - name: update NOTICE.txt and NOTICE-fips.txt