fix mistake

Author: rileyfiretail

build_setup/Dockerfile

@@ -1,6 +1,6 @@
 # Use official .NET SDK image as base
 FROM mcr.microsoft.com/dotnet/sdk:9.0 AS build
-ARG VERSION=1.0.2
+ARG VERSION=v1.0.2
 ENV VERSION=${VERSION}
 
 # Install necessary tools (optional curl for debugging)
@@ -20,7 +20,7 @@ RUN dotnet restore
 
 # Build the project
 # Update version in csproj file
-RUN TRIMMED_VERSION=$(echo $VERSION | cut -c1-) && \
+RUN TRIMMED_VERSION=$(echo $VERSION | cut -c2-) && \
     sed -i "s/<Version>.*<\/Version>/<Version>$TRIMMED_VERSION<\/Version>/" Firetail.Net.csproj
 
 RUN dotnet build -c Release -o /output