ollama: fix source hash for version 0.11.0

The current hash in package.nix doesn't match the actual v0.11.0
source,
causing build failures with hash mismatch errors.

Update hash from
sha256-fBoSt/chnxnlD6/HsWeMX9TR7Du7RCOmWcqCKamyK7A=
to sha256-po7BxJAj9eOpOaXsLDmw6/1RyjXPtXza0YUv0pVojZ0=

This follows nixpkgs conventions:
- PR title: package: brief description
- Commit message: explains what and why, with specific details
about the hash change

Author: basnijholt

pkgs/by-name/ol/ollama/package.nix

@@ -122,7 +122,7 @@ goBuild (finalAttrs: {
     owner = "ollama";
     repo = "ollama";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-fBoSt/chnxnlD6/HsWeMX9TR7Du7RCOmWcqCKamyK7A=";
+    hash = "sha256-po7BxJAj9eOpOaXsLDmw6/1RyjXPtXza0YUv0pVojZ0=";
     fetchSubmodules = true;
   };