docs: fix Isaac Lab container pull tag to 3.0.0-beta2

The docker deployment docs referenced nvcr.io/nvidia/isaac-lab:3.0.0.beta2
(dot), but the published NGC container tag uses a hyphen (3.0.0-beta2),
matching the 3.0.0-beta1 convention. The dotted tag does not exist, so
the documented docker pull/run commands would fail.

Author: sheikh-nv

docs/source/deployment/docker.rst

@@ -322,7 +322,7 @@ To pull the minimal Isaac Lab container, run:
 
 .. code:: bash
 
-  docker pull nvcr.io/nvidia/isaac-lab:3.0.0.beta2
+  docker pull nvcr.io/nvidia/isaac-lab:3.0.0-beta2
 
 .. attention::
 
@@ -353,7 +353,7 @@ To run the Isaac Lab container with an interactive bash session, run:
      -v ~/docker/isaac-sim/logs:/root/.nvidia-omniverse/logs:rw \
      -v ~/docker/isaac-sim/data:/root/.local/share/ov/data:rw \
      -v ~/docker/isaac-sim/documents:/root/Documents:rw \
-     nvcr.io/nvidia/isaac-lab:3.0.0.beta2
+     nvcr.io/nvidia/isaac-lab:3.0.0-beta2
 
 To enable rendering through X11 forwarding, run:
 
@@ -372,7 +372,7 @@ To enable rendering through X11 forwarding, run:
      -v ~/docker/isaac-sim/logs:/root/.nvidia-omniverse/logs:rw \
      -v ~/docker/isaac-sim/data:/root/.local/share/ov/data:rw \
      -v ~/docker/isaac-sim/documents:/root/Documents:rw \
-     nvcr.io/nvidia/isaac-lab:3.0.0.beta2
+     nvcr.io/nvidia/isaac-lab:3.0.0-beta2
 
 To run an example within the container, run: