update conformance make command

Author: Alfus

.github/workflows/conformance.yaml

@@ -30,4 +30,4 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
       - name: Test conformance
-        run: make conformance # TODO add: PYTHON=${{ steps.python.outputs.python-path }}
+        run: make conformance PYTHON=${{ steps.python.outputs.python-path }}

Makefile

@@ -49,7 +49,7 @@ test: $(BIN)/protovalidate-conformance generate install ## Run unit tests
 
 .PHONY: conformance
 conformance: $(BIN)/protovalidate-conformance generate install ## Run conformance tests
-	protovalidate-conformance $(CONFORMANCE_ARGS) pipenv -- run $(PYTHON) -m tests.conformance.runner
+	protovalidate-conformance $(CONFORMANCE_ARGS) pipenv -- --python $(PYTHON) run python3 -m tests.conformance.runner
 
 .PHONY: lint
 lint: install ## Lint code