chore: pin actions to SHA in .github/workflows/test.yml

Author: slawomirbabicz

.github/workflows/test.yml

@@ -15,9 +15,9 @@ jobs:
       matrix:
         os: [ubuntu-24.04, ubuntu-24.04-arm, macos-15, macos-15-intel]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
-      - uses: actions/cache@v4
+      - uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
         with:
           path: |
             ~/.cargo/registry