Update actions/checkout digest to 1d96c77 (#152)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://togithub.com/actions/checkout) | action |
digest | `b4ffde6` -> `1d96c77` |

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.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+        uses: actions/checkout@1d96c772d19495a3b5c517cd2bc0cb401ea0529f # v4
 
       - name: Set up Java environment
         uses: actions/setup-java@v4
@@ -41,7 +41,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+        uses: actions/checkout@1d96c772d19495a3b5c517cd2bc0cb401ea0529f # v4
 
       - name: Set up Java environment
         uses: actions/setup-java@v4
@@ -62,7 +62,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+        uses: actions/checkout@1d96c772d19495a3b5c517cd2bc0cb401ea0529f # v4
 
       - name: Set up Java environment
         uses: actions/setup-java@v4