Removed *`* because it crashes build

There was a mistake in [last commit](https://github.com/actions/starter-workflows/commit/5ac32fc0977190a464c62c63cad5fcb04067c34e),  that added additional *`* which causes this error 
```
/Users/runner/work/_temp/2259bec8-2d05-441b-ada0-fad594134af2.sh: line 5: unexpected EOF while looking for matching ``'
14
Error: Process completed with exit code 2.
```
I just simply removed it.

ci/ios.yml

@@ -37,7 +37,7 @@ jobs:
           platform: ${{ 'iOS Simulator' }}
         run: |
           # xcrun xctrace returns via stderr, not the expected stdout (see https://developer.apple.com/forums/thread/663959)
-          device=`xcrun xctrace list devices 2>&1 | grep -oE 'iPhone.*?[^\(]+' | head -1 | awk '{$1=$1;print}'``
+          device=`xcrun xctrace list devices 2>&1 | grep -oE 'iPhone.*?[^\(]+' | head -1 | awk '{$1=$1;print}'`
           if [ $scheme = default ]; then scheme=$(cat default); fi
           if [ "`ls -A | grep -i \\.xcworkspace\$`" ]; then filetype_parameter="workspace" && file_to_build="`ls -A | grep -i \\.xcworkspace\$`"; else filetype_parameter="project" && file_to_build="`ls -A | grep -i \\.xcodeproj\$`"; fi
           file_to_build=`echo $file_to_build | awk '{$1=$1;print}'`