fix(c6): use esptool 4.6 for ESP32-C6

Author: tyeth

.github/workflows/build-clang-doxy.yml

@@ -465,7 +465,7 @@ jobs:
           mv nanopb/pb.h src/nanopb/nanopb.pb.h
       - name: Install Dependencies
         run: |
-          pip install esptool
+          pip install esptool==4.6
       - name: build ESP32 platforms
         run: python3 ci/build_platform.py ${{ matrix.arduino-platform }} --build_timeout 48000
       - name: Check artifacts
@@ -1005,7 +1005,7 @@ jobs:
           mv nanopb/pb.h src/nanopb/nanopb.pb.h
       - name: Install Dependencies
         run: |
-          pip3 install esptool
+          pip3 install esptool==4.6
       - name: build ESP32 platforms
         run: python3 ci/build_platform.py ${{ matrix.arduino-platform }} --build_timeout 48000
       - name: Check artifacts