switch from set-output to $GITHUB_OUTPUT

Since GH is deprecating set-output, switch to the new hotness.
https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

action.yml

@@ -55,17 +55,17 @@ runs:
     # here.  Wait to see if anyone needs something else.
     - name: URL encode project name
       id: project
-      run: echo "::set-output name=project::${{ inputs.project }}" | sed -e 's:/:%2F:g'
+      run: echo "project=${{ inputs.project }}" | sed -e 's:/:%2F:g' >> $GITHUB_OUTPUT
       shell: bash
 
     # The Coverity site says the tool is usually updated twice yearly, so the
     # md5 of download can be used to determine whether there's been an update.
     - name: Lookup Coverity Build Tool hash
       id: coverity-cache-lookup
       run: |
-        printf "::set-output name=hash::"; \
-        curl https://scan.coverity.com/download/${{ inputs.build_language }}/${{ inputs.build_platform }} \
-          --data "token=${TOKEN}&project=${{ steps.project.outputs.project }}&md5=1"
+        hash=$(curl https://scan.coverity.com/download/${{ inputs.build_language }}/${{ inputs.build_platform }} \
+                 --data "token=${TOKEN}&project=${{ steps.project.outputs.project }}&md5=1"); \
+        echo "hash=${hash}" >> $GITHUB_OUTPUT
       shell: bash
       env:
         TOKEN: ${{ inputs.token }}