fix: use ${GITHUB_ACTION_PATH} when referencing external files

action.yml

         esac 
 name: SonarQube Issue Conversion 
 description: Transform tool output into generic SonarQube format(s) 
 inputs: 
   input: 
     description: Single or multiple tool output files to convert 
     required: true 
   output: 
     description: Output file for converted issues 
     required: true 
   transformation: 
     description: Type of transformation to apply (one of gtest-to-generic-execution, mutation-test-to-generic-issue) 
     required: true 
 runs: 
   using: composite 
   steps: 
     - uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0 
       with: 
         python-version: '3.12' 
     - shell: bash 
       run: | 
         python -m pip install --upgrade pip==24.3.1 
         pip install lxml 
     - shell: bash 
       run: | 
         echo 'Using transformation: ${{ inputs.transformation }} to convert ${{ inputs.input }} to ${{ inputs.output }}' 
         case ${{ inputs.transformation }} in 
           'gtest-to-generic-execution') 
             { echo '<testExecutions version="1">'; xsltproc ${GITHUB_ACTION_PATH}/converters/gtest-to-generic-execution.xslt ${{ inputs.input }}; echo '</testExecutions>'; } | tee ${{ inputs.output }} > /dev/null 
             ;; 
           'mutation-test-to-generic-issue') 
             ;; 
           *) 
             echo 'Unknown transformation type: ${{ inputs.transformation }}' 
             exit 1 
             ;; 
         esac 
@@ -29,7 +29,7 @@ runs:
 
         case ${{ inputs.transformation }} in
           'gtest-to-generic-execution')
-            { echo '<testExecutions version="1">'; xsltproc converters/gtest-to-generic-execution.xslt ${{ inputs.input }}; echo '</testExecutions>'; } | tee ${{ inputs.output }} > /dev/null
+            { echo '<testExecutions version="1">'; xsltproc ${GITHUB_ACTION_PATH}/converters/gtest-to-generic-execution.xslt ${{ inputs.input }}; echo '</testExecutions>'; } | tee ${{ inputs.output }} > /dev/null
             ;;
           'mutation-test-to-generic-issue')
             ;;