doc: clarify both rocm and main bundle necessary (ollama#11900)

Some users expect the rocm bundles to be self-sufficient, but are designed to be additive.

Author: dhiltgen

docs/linux.md

@@ -34,7 +34,11 @@ ollama -v
 
 ### AMD GPU install
 
-If you have an AMD GPU, also download and extract the additional ROCm package:
+If you have an AMD GPU, **also** download and extract the additional ROCm package:
+
+> [!IMPORTANT]
+> The ROCm tgz contains only AMD dependent libraries.  You must extract **both** `ollama-linux-amd64.tgz` and `ollama-linux-amd64-rocm.tgz` into the same location.
+
 
 ```shell
 curl -L https://ollama.com/download/ollama-linux-amd64-rocm.tgz -o ollama-linux-amd64-rocm.tgz

docs/windows.md

@@ -68,9 +68,9 @@ If you'd like to install or integrate Ollama as a service, a standalone
 `ollama-windows-amd64.zip` zip file is available containing only the Ollama CLI
 and GPU library dependencies for Nvidia.  If you have an AMD GPU, also download
 and extract the additional ROCm package `ollama-windows-amd64-rocm.zip` into the
-same directory.  This allows for embedding Ollama in existing applications, or
-running it as a system service via `ollama serve` with tools such as
-[NSSM](https://nssm.cc/). 
+same directory.  Both zip files are necessary for a complete AMD installation.
+This allows for embedding Ollama in existing applications, or running it as a
+system service via `ollama serve` with tools such as [NSSM](https://nssm.cc/). 
 
 > [!NOTE]  
 > If you are upgrading from a prior version, you should remove the old directories first.