extract version number for github action

Author: SciLor

.github/workflows/bootloader.yml

@@ -29,8 +29,8 @@ jobs:
       if: startsWith(github.ref, 'refs/tags/hbng_bl_v')
       run: |
         echo "TAG_NAME=${GITHUB_REF#refs/tags/}" >> $GITHUB_ENV
-        echo "RELEASE_NAME=Release ${GITHUB_REF#refs/tags/}" >> $GITHUB_ENV
-        echo "ASSET_APPENDIX=release_${GITHUB_REF#refs/tags/}" >> $GITHUB_ENV
+        echo "RELEASE_NAME=Release ${GITHUB_REF#refs/tags/hbng_bl_}" >> $GITHUB_ENV
+        echo "ASSET_APPENDIX=release_${GITHUB_REF#refs/tags/hbng_bl_}" >> $GITHUB_ENV
         echo "IS_PRERELEASE=false" >> $GITHUB_ENV
 
     - uses: actions/checkout@v2