Change doxygen version to 1.9.6

.github/workflows/indent.yml

@@ -22,7 +22,7 @@ jobs:
         fetch-depth: 100
     - uses: ssciwr/doxygen-install@v1
       with:
-        version: "1.9.5"
+        version: "1.9.6"
     - name: setup
       run: |
         ./contrib/utilities/download_clang_format
@@ -51,9 +51,6 @@ jobs:
         # warning: Found recursive @copydetails or @copydoc relation for argument '<arg>'
         sed -i '/@copydetails or @copydoc/d' doxygen.log 
         # Suppress:
-        # warning: '<name>' has @param documentation sections but no arguments
-        sed -i '/has @param documentation sections but no arguments/d' doxygen.log 
-        # Suppress:
         # warning: explicit link request to '<function>' could not be resolved
         sed -i '/explicit link request to/d' doxygen.log
         # Remove empty lines