docs(vm): simplify release notes install section

Author: drew

.github/workflows/release-vm-dev.yml

@@ -526,14 +526,7 @@ jobs:
             curl -fsSL https://raw.githubusercontent.com/NVIDIA/OpenShell/main/install-vm.sh | sh
             ```
 
-            Install to a custom directory:
-
-            ```
-            curl -fsSL https://raw.githubusercontent.com/NVIDIA/OpenShell/main/install-vm.sh | OPENSHELL_VM_INSTALL_DIR=/usr/local/bin sh
-            ```
-
-            The installer auto-detects your platform, verifies checksums, and codesigns
-            on macOS (Hypervisor entitlement). Defaults to `~/.local/bin`.
+            Auto-detects your platform, verifies checksums, and codesigns on macOS.
 
           files: |
             release-final/openshell-vm-aarch64-unknown-linux-gnu.tar.gz

.github/workflows/release-vm-kernel.yml

@@ -260,14 +260,7 @@ jobs:
             curl -fsSL https://raw.githubusercontent.com/NVIDIA/OpenShell/main/install-vm.sh | sh
             ```
 
-            Install to a custom directory:
-
-            ```
-            curl -fsSL https://raw.githubusercontent.com/NVIDIA/OpenShell/main/install-vm.sh | OPENSHELL_VM_INSTALL_DIR=/usr/local/bin sh
-            ```
-
-            The installer auto-detects your platform, verifies checksums, and codesigns
-            on macOS (Hypervisor entitlement). Defaults to `~/.local/bin`.
+            Auto-detects your platform, verifies checksums, and codesigns on macOS.
 
           files: |
             release/vm-runtime-linux-aarch64.tar.zst