Update rapids version to 25.04 (#545)

Author: raydouglass

Diff for: README.md

@@ -128,10 +128,10 @@ The RAPIDS versions for things like container images and install instructions ar
 ```python
 versions = {
     "stable": {
-        "rapids_container": "nvcr.io/nvidia/rapidsai/base:25.02-cuda12.8-py3.12",
+        "rapids_container": "nvcr.io/nvidia/rapidsai/base:25.04-cuda12.8-py3.12",
     },
     "nightly": {
-        "rapids_container": "rapidsai/base:25.04a-cuda12.8-py3.12",
+        "rapids_container": "rapidsai/base:25.06a-cuda12.8-py3.12",
     },
 }
 ```

Diff for: source/conf.py

@@ -21,8 +21,8 @@
 author = "NVIDIA"
 
 # Single modifiable version for all of the docs - easier for future updates
-stable_version = "25.02"
-nightly_version = "25.04"
+stable_version = "25.04"
+nightly_version = "25.06"
 
 versions = {
     "stable": {