Syntax fix for github action (#4846)

https://docs.github.com/en/actions/sharing-automations/creating-actions/metadata-syntax-for-github-actions#runs-for-composite-actions

.github/actions/build-variant/action.yml

@@ -40,7 +40,7 @@ runs:
       uses: ./.github/actions/setup-base
 
     - name: Pull web ui
-      if: ${{ inputs.include-web-ui == "true" }}
+      if: inputs.include-web-ui == 'true'
       uses: dsaltares/fetch-gh-release-asset@master
       with:
         repo: meshtastic/web
@@ -49,7 +49,7 @@ runs:
         token: ${{ inputs.github_token }}
 
     - name: Unpack web ui
-      if: ${{ inputs.include-web-ui == "true" }}
+      if: inputs.include-web-ui == 'true'
       shell: bash
       run: |
         tar -xf build.tar -C data/static
@@ -57,7 +57,7 @@ runs:
 
     - name: Remove debug flags for release
       shell: bash
-      if: ${{ inputs.remove-debug-flags != "" }}
+      if: inputs.remove-debug-flags != ''
       run: |
         for PATH in ${{ inputs.remove-debug-flags }}; do
           sed -i '/DDEBUG_HEAP/d' ${PATH}
@@ -68,7 +68,7 @@ runs:
       run: ${{ inputs.build-script-path }} ${{ inputs.board }}
 
     - name: Pull OTA Firmware
-      if: ${{ inputs.ota-firmware-source != "" && inputs.ota-firmware-target != "" }}
+      if: inputs.ota-firmware-source != '' &&  inputs.ota-firmware-target != ''
       uses: dsaltares/fetch-gh-release-asset@master
       with:
         repo: meshtastic/firmware-ota