use the right function names

Author: keewis

.github/workflows/ci.yml

@@ -48,4 +48,4 @@ jobs:
       - name: run action
         uses: ./
         with:
-          environment-paths: "${{ toJson(matrix.env-paths) }}"
+          environment-paths: "${{ toJSON(matrix.env-paths) }}"

action.yaml

@@ -20,8 +20,8 @@ runs:
       shell: bash -l {0}
       run: |
         echo "${{ inputs.environment-paths }}"
-        echo "${{ fromJson(inputs.environment-paths) }}"
+        echo "${{ fromJSON(inputs.environment-paths) }}"
     - name: analyze environments
       shell: bash -l {0}
       run: |
-        python minimum_versions.py "${{ fromJson(inputs.environment-paths) }}"
+        python minimum_versions.py "${{ fromJSON(inputs.environment-paths) }}"