Fixed incorrect automatic variable used (#1565)

$@ is the name of the target being generated, and $^ are the dependencies

Co-authored-by: Louis-Dupont <35190946+Louis-Dupont@users.noreply.github.com>
(cherry picked from commit 43f8bea)

Makefile

@@ -36,8 +36,8 @@ NOTEBOOKS = src/super_gradients/examples/model_export/models_export.ipynb
 
 # This Makefile target runs notebooks listed below and converts them to markdown files in documentation/source/
 run_and_convert_notebooks_to_docs: $(NOTEBOOKS)
-	jupyter nbconvert --to markdown --output-dir="documentation/source/" --execute $@
+	jupyter nbconvert --to markdown --output-dir="documentation/source/" --execute $^
 
 # This Makefile target runs notebooks listed below and converts them to markdown files in documentation/source/
 check_notebooks_version_match: $(NOTEBOOKS)
-	python tests/verify_notebook_version.py $@
+	python tests/verify_notebook_version.py $^