Update Dockerfile

Author: kumarabd

Dockerfile

@@ -7,7 +7,7 @@ RUN go mod download
 COPY main.go main.go
 COPY internal/ internal/
 COPY osm/ osm/
-RUN CGO_ENABLED=1 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -ldflags="-w -s -X main.version=$VERSION -X main.gitsha=$GIT_SHA" -a -o meshery-osm main.go
+RUN CGO_ENABLED=1 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -ldflags="-w -s -X main.version=$VERSION -X main.gitsha=$GIT_COMMITSHA" -a -o meshery-osm main.go
 
 FROM gcr.io/distroless/base
 ENV DISTRO="debian"