[Fix]: Change MMCV minimum version to 2.0.0rc4 (open-mmlab#9695)

Author: KeiChiTse

docs/en/notes/faq.md

@@ -11,6 +11,7 @@ We list some common troubles faced by many users and their corresponding solutio
   | MMDetection version |      MMCV version       |     MMEngine version     |
   | :-----------------: | :---------------------: | :----------------------: |
   |         3.x         | mmcv>=2.0.0rc1, \<2.1.0 | mmengine>=0.3.0, \<1.0.0 |
+  |      3.0.0rc6       | mmcv>=2.0.0rc4, \<2.1.0 | mmengine>=0.3.0, \<1.0.0 |
   |      3.0.0rc5       | mmcv>=2.0.0rc1, \<2.1.0 | mmengine>=0.3.0, \<1.0.0 |
   |      3.0.0rc4       | mmcv>=2.0.0rc1, \<2.1.0 | mmengine>=0.3.0, \<1.0.0 |
   |      3.0.0rc3       | mmcv>=2.0.0rc1, \<2.1.0 | mmengine>=0.3.0, \<1.0.0 |

mmdet/__init__.py

@@ -5,7 +5,7 @@
 
 from .version import __version__, version_info
 
-mmcv_minimum_version = '2.0.0rc0'
+mmcv_minimum_version = '2.0.0rc4'
 mmcv_maximum_version = '2.1.0'
 mmcv_version = digit_version(mmcv.__version__)