chore(deps): update arkedge/workflows-c2a action to v6

Author: renovate[bot]

.github/workflows/build.yml

@@ -16,7 +16,7 @@ jobs:
           - mobc
           - subobc
 
-    uses: arkedge/workflows-c2a/.github/workflows/build.yml@092c8dff10cf5eb6d3af4c3b47bc5b57fe07e633 # v5.4.0
+    uses: arkedge/workflows-c2a/.github/workflows/build.yml@cb46d1d34f43244e40506eb551204ea55357d661 # v6.0.2
     with:
       c2a_dir: examples/${{ matrix.user }}
       c2a_custom_setup: |

.github/workflows/check_coding_rule.yml

@@ -15,7 +15,7 @@ jobs:
         user:
           - mobc
           - subobc
-    uses: arkedge/workflows-c2a/.github/workflows/check-coding-rule.yml@092c8dff10cf5eb6d3af4c3b47bc5b57fe07e633 # v5.4.0
+    uses: arkedge/workflows-c2a/.github/workflows/check-coding-rule.yml@cb46d1d34f43244e40506eb551204ea55357d661 # v6.0.2
     with:
       c2a_dir: examples/${{ matrix.user }}
       c2a_custom_setup: |