docs: fix typo in URL (open-telemetry#1819)

Author: hairmare

docs/examples/django/README.rst

@@ -142,4 +142,4 @@ References
 
 * `Django <https://djangoproject.com/>`_
 * `OpenTelemetry Project <https://opentelemetry.io/>`_
-* `OpenTelemetry Django extension <https://github.com/open-telemetry/opentelemetry-python-contib/tree/main/instrumentation/opentelemetry-instrumentation-django>`_
+* `OpenTelemetry Django extension <https://github.com/open-telemetry/opentelemetry-python-contrib/tree/main/instrumentation/opentelemetry-instrumentation-django>`_