fix: piping input through env variable instead of shell expansion

Author: burythehammer

.github/actions/run-testacc/action.yml

@@ -9,9 +9,11 @@ runs:
   steps:
     - name: Run tests
       shell: bash
+      env:
+        TEST_PATTERN: ${{ inputs.test_pattern }}
       run: |
         set -o pipefail
-        EXECUTE_TESTS=true make testacc TESTARGS='-run="${{ inputs.test_pattern }}"' 2>&1 | tee test_output.txt
+        EXECUTE_TESTS=true make testacc TESTARGS="-run=\"$TEST_PATTERN\"" 2>&1 | tee test_output.txt
         if ! grep -q "=== RUN" test_output.txt; then
           echo "ERROR: No tests matched the pattern. Please check the -run argument."
           exit 1