Update import-lib version restriction to reflect opentelemetry-api (#31886)

Author: lzchen

sdk/monitor/azure-monitor-opentelemetry-exporter/setup.py

@@ -86,7 +86,7 @@
         "msrest>=0.6.10",
         "opentelemetry-api~=1.19.0",
         "opentelemetry-sdk~=1.19.0",
-        "importlib-metadata~=6.0.0; python_version < '3.8'"
+        "importlib-metadata~=6.0; python_version < '3.8'"
     ],
     entry_points={
         "opentelemetry_traces_exporter": [