Update link to A/B experiments description (microsoft#20409)

Closes microsoft#15635

Author: Kartik Raj

package.nls.json

@@ -31,8 +31,8 @@
     "python.diagnostics.sourceMapsEnabled.description": "Enable source map support for meaningful stack traces in error logs.",
     "python.envFile.description": "Absolute path to a file containing environment variable definitions.",
     "python.experiments.enabled.description": "Enables A/B tests experiments in the Python extension. If enabled, you may get included in proposed enhancements and/or features.",
-    "python.experiments.optInto.description": "List of experiment to opt into. If empty, user is assigned the default experiment groups. See https://github.com/microsoft/vscode-python/wiki/Experiments for more details.",
-    "python.experiments.optOutFrom.description": "List of experiment to opt out of. If empty, user is assigned the default experiment groups. See https://github.com/microsoft/vscode-python/wiki/Experiments for more details.",
+    "python.experiments.optInto.description": "List of experiment to opt into. If empty, user is assigned the default experiment groups. See https://github.com/microsoft/vscode-python/wiki/AB-Experiments for more details.",
+    "python.experiments.optOutFrom.description": "List of experiment to opt out of. If empty, user is assigned the default experiment groups. See https://github.com/microsoft/vscode-python/wiki/AB-Experiments for more details.",
     "python.formatting.autopep8Args.description": "Arguments passed in. Each argument is a separate item in the array.",
     "python.formatting.autopep8Path.description": "Path to autopep8, you can use a custom version of autopep8 by modifying this setting to include the full path.",
     "python.formatting.blackArgs.description": "Arguments passed in. Each argument is a separate item in the array.",