Refactor Github Action per b/485167538 (#1648)

This is a http://go/LSC run by http://go/ghss to automatically refactor
your Github Actions per http://b/485167538.

This is a PR to help you upgrade to the latest standards in Github
Actions.

Please merge this PR to accept the changes. NOTE: if you do not accept
this PR, it may be force merged by the GHSS team. See http://b/485167538
for more details.

Author: tjohns

.github/workflows/build-sample.yml

@@ -32,7 +32,9 @@ jobs:
           distribution: 'zulu'
 
       - name: Generate cache key
-        run: ./scripts/checksum.sh ${{ inputs.path }} checksum.txt
+        run: ./scripts/checksum.sh ${INPUTS_PATH} checksum.txt
+        env:
+          INPUTS_PATH: ${{ inputs.path }}
 
       - uses: actions/cache@v3
         with: