doc: fix woke terminology and resolve pygments lexer warning

- Sanitize non-inclusive terms in developer guides, diagrams, and testbench documentation.
- Replace c code-block with text in rimage toml.h excerpt to resolve Pygments token failure.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>

Author: lrgirdwo

developer_guides/firmware/dcblock.rst

@@ -309,7 +309,7 @@ Sound Open Firmware provides standard tuning presets configured for common sampl
      - 0.9922
      - 0.9974
      - ~37 ms
-     - High-fidelity music playback, studio monitors, mastering pipelines.
+     - High-fidelity music playback, studio monitors, audio post-production pipelines.
    * - **40 Hz**
      - 0.9844
      - 0.9948

developer_guides/firmware/images/hostless_clocking_audio_bridges.svg

@@ -585,7 +585,7 @@ Channel routing is governed by a packed 32-bit configuration word (``chmap``). E
 * **Nibble 0** (Bits 3..0): Specifies the source channel index copied into Sink Channel 0.
 * **Nibble 1** (Bits 7..4): Specifies the source channel index copied into Sink Channel 1.
 * **Nibble** :math:`k` (Bits :math:`4k+3 \dots 4k`): Specifies the source channel index copied into Sink Channel :math:`k`.
-* **The Identity Mapping** (``DUMMY_CHMAP``):
+* **The Identity Mapping** (``IDENTITY_CHMAP``):
   ``0x76543210`` maps source channel 0 to sink 0, source 1 to sink 1, up to source 7 to sink 7.
 
 The Special ``0xF`` Mute Nibble & Out-of-Bounds Protection

developer_guides/firmware/images/hostless_system_architecture.svg

@@ -545,7 +545,7 @@ To ensure that the open-source community, continuous integration (CI) test matri
      void RTKMA_API_S32_Default(...);
 
 * **Circular Buffer Passthrough**:
-  Rather than performing dummy mathematical operations, the stub executes ``rtnr_stub_passthrough``, invoking ``cir_buf_copy`` across the ``audio_stream_rtnr`` descriptors:
+  Rather than performing placeholder mathematical operations, the stub executes ``rtnr_stub_passthrough``, invoking ``cir_buf_copy`` across the ``audio_stream_rtnr`` descriptors:
 
   .. math::
 

developer_guides/firmware/pcm_converter.rst

@@ -317,7 +317,7 @@ C Preprocessor TOML Templates (``*.toml.h``)
 
 To synchronize firmware module IDs and Kconfig features with Rimage, platform templates (e.g. ``ptl.toml.h``) leverage the C preprocessor:
 
-.. code-block:: c
+.. code-block:: text
 
    /* Excerpt from ptl.toml.h */
    #include "platform-ptl.toml"

developer_guides/firmware/rtnr.rst

@@ -3,7 +3,7 @@
 Build and Run Testbench
 #######################
 
-This guide covers building the SOF Testbench from source, preparing audio test streams, executing native simulations, and running quick sanity checks.
+This guide covers building the SOF Testbench from source, preparing audio test streams, executing native simulations, and running quick verification checks.
 
 Prerequisites and System Dependencies
 *************************************
@@ -78,10 +78,10 @@ For fine-grained control over compiler flags, sanitizers, or build types:
    # Compile and install
    cmake --build build_testbench -j$(nproc) --target install
 
-Quick Sanity Verification (``host-testbench.sh``)
-*************************************************
+Quick Verification (``host-testbench.sh``)
+*******************************************
 
-To confirm that the testbench build and audio processing components are functioning properly, execute the quick sanity script:
+To confirm that the testbench build and audio processing components are functioning properly, execute the quick verification script:
 
 .. code-block:: bash
 

developer_guides/rimage/index.rst

@@ -165,7 +165,7 @@ SOF provides three standard wrapper scripts located in ``scripts/`` to streamlin
 2. ``scripts/sof-testbench-helper.sh``:
    High-level test runner that handles WAV-to-RAW audio format conversions via ``sox``, locates default component benchmark topologies, executes testbench, and converts output back to WAV with a single command.
 3. ``scripts/host-testbench.sh``:
-   Quick sanity test suite that compiles and runs smoke tests for Volume, SRC, and IIR Equalizer components, verifying exit codes and output file sizes.
+   Quick verification test suite that compiles and runs smoke tests for Volume, SRC, and IIR Equalizer components, verifying exit codes and output file sizes.
 
 Quick Start: Simulating an Audio Pipeline
 *****************************************