Update difftest/doc/organization.md

Co-authored-by: Jiuyang Liu <[email protected]>

difftest/doc/organization.md

@@ -14,7 +14,7 @@
    - `dpi_t1/` and `dpi_t1rocket/`: Contain the TestBench code for `t1` and `t1rocket`, respectively. Each directory includes source files providing the DPI library linked by emulator(vcs or verilator), these DPIs will be called by corresponding Testbench.
 
 3. **Difftest Directories**
-   - `offline_t1/` and `offline_t1rocket/`: Correspond to the verification projects for `t1` and `t1rocket`, respectively. These directories include the main test code files, used for executing verification and testing.
+   - `offline_t1/` and `offline_t1rocket/`: Correspond to the verification projects for `t1` and `t1rocket`, respectively. These directories include the difftest code files, used for the difftest verification framework.
    - `spike_interfaces/`: Contains C++ code files for interface definitions.
    - `spike_rs/`: Source files include `lib.rs`, `runner.rs`, and `spike_event.rs`, which provide the methods and tools needed during the verification phase.