Update Google Ads oauth specs

[ChristopheDuong]

What

Describe what the change is solving
Follow-up to changes introduced by #6456

How

Update oauth specs for connector

[ChristopheDuong]

/test connector=connectors/source-google-ads

🕑 connectors/source-google-ads https://github.com/airbytehq/airbyte/actions/runs/1278356608
✅ connectors/source-google-ads https://github.com/airbytehq/airbyte/actions/runs/1278356608
Python tests coverage:

	 ---------- coverage: platform linux, python 3.8.10-final-0 -----------
	 Name                                                 Stmts   Miss  Cover
	 ------------------------------------------------------------------------
	 source_acceptance_test/__init__.py                       2      0   100%
	 source_acceptance_test/base.py                          10      4    60%
	 source_acceptance_test/config.py                        74      8    89%
	 source_acceptance_test/conftest.py                     108    108     0%
	 source_acceptance_test/plugin.py                        45     45     0%
	 source_acceptance_test/tests/__init__.py                 4      0   100%
	 source_acceptance_test/tests/test_core.py              158    109    31%
	 source_acceptance_test/tests/test_full_refresh.py       18     11    39%
	 source_acceptance_test/tests/test_incremental.py        69     38    45%
	 source_acceptance_test/utils/__init__.py                 6      0   100%
	 source_acceptance_test/utils/asserts.py                 37      2    95%
	 source_acceptance_test/utils/common.py                  41     25    39%
	 source_acceptance_test/utils/compare.py                 47     20    57%
	 source_acceptance_test/utils/connector_runner.py        82     49    40%
	 source_acceptance_test/utils/json_schema_helper.py      75     11    85%
	 ------------------------------------------------------------------------
	 TOTAL                                                  776    430    45%
	 ---------- coverage: platform linux, python 3.8.10-final-0 -----------
	 Name                                       Stmts   Miss  Cover
	 --------------------------------------------------------------
	 source_google_ads/__init__.py                  2      0   100%
	 source_google_ads/custom_query_stream.py      75     50    33%
	 source_google_ads/google_ads.py               65     10    85%
	 source_google_ads/source.py                   35     15    57%
	 source_google_ads/streams.py                  77      5    94%
	 --------------------------------------------------------------
	 TOTAL                                        254     80    69%
	 ---------- coverage: platform linux, python 3.8.10-final-0 -----------
	 Name                                       Stmts   Miss  Cover
	 --------------------------------------------------------------
	 source_google_ads/__init__.py                  2      0   100%
	 source_google_ads/custom_query_stream.py      75      6    92%
	 source_google_ads/google_ads.py               65      7    89%
	 source_google_ads/source.py                   35     22    37%
	 source_google_ads/streams.py                  77     15    81%
	 --------------------------------------------------------------
	 TOTAL                                        254     50    80%

[CLAassistant]

All committers have signed the CLA.

[ChristopheDuong]

/publish connector=connectors/source-google-ads

🕑 connectors/source-google-ads https://github.com/airbytehq/airbyte/actions/runs/1279345092
❌ connectors/source-google-ads https://github.com/airbytehq/airbyte/actions/runs/1279345092

[ChristopheDuong]

/publish connector=connectors/source-google-ads

🕑 connectors/source-google-ads https://github.com/airbytehq/airbyte/actions/runs/1279434230
✅ connectors/source-google-ads https://github.com/airbytehq/airbyte/actions/runs/1279434230