tools/examples: hardcode #!/usr/bin/python shebang
diff --git a/tools/biotop.py b/tools/biotop.py
index 3fe454c..62c295d 100755
--- a/tools/biotop.py
+++ b/tools/biotop.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python
 # @lint-avoid-python-3-compatibility-imports
 #
 # biotop  block device (disk) I/O by process.