Replace deprecated set-output (#70)

Co-authored-by: Joakim Sørensen <hi@ludeeus.dev>

action.yaml

@@ -97,7 +97,7 @@ runs:
           options+=("-S ${{ inputs.severity }}")
         fi
         options+=("--format=${{ inputs.format }}")
-        echo "::set-output name=options::${options[@]}"
+        echo "options=${options[@]}" >> $GITHUB_OUTPUT
 
     - name: Gather excluded paths
       shell: bash
@@ -130,7 +130,7 @@ runs:
           echo "::debug:: Adding '$name' to excludes"
           excludes+=("! -name $name")
         done
-        echo "::set-output name=excludes::${excludes[@]}"
+        echo "excludes=${excludes[@]}" >> $GITHUB_OUTPUT
 
         set +f # re-enable globbing
 
@@ -143,7 +143,7 @@ runs:
           echo "::debug:: Adding '$file' to excludes"
           files+=("-o -name \"*$file\"")
         done
-        echo "::set-output name=files::${files[@]}"
+        echo "files=${files[@]}" >> $GITHUB_OUTPUT
 
     - name: Run the check
       shell: bash
@@ -210,8 +210,8 @@ runs:
           done
         fi
 
-        echo "::set-output name=filepaths::${filepaths[@]}"
+        echo "filepaths=${filepaths[@]}" >> $GITHUB_OUTPUT
-        echo "::set-output name=statuscode::$statuscode"
+        echo "statuscode=$statuscode" >> $GITHUB_OUTPUT
 
     - name: Exit action
       shell: bash