refactor: Remove unnecessary build args in example go app (runfinch#36)

The removed args solved a common static linking problem in old versions
of go, per
golang/go#9344 (comment)

Signed-off-by: Alexander Else <[email protected]>

Issue #, if available:

*Description of changes:*

Remove build flags relating to old go versions from example go app

*Testing done:*

Built and ran container derived from updated code, using `finch build`
and `finch run`

- [ x ] I've reviewed the guidance in CONTRIBUTING.md


#### License Acceptance

By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 license.

Signed-off-by: Alexander Else <[email protected]>
Co-authored-by: Weike Qu <[email protected]>

contrib/hello-finch/Dockerfile

@@ -2,7 +2,7 @@ FROM public.ecr.aws/docker/library/golang:1.19 AS builder
 WORKDIR /build
 COPY . .
 
-RUN CGO_ENABLED=0 go build -a -installsuffix cgo -ldflags '-extldflags "-static"' -o hello-finch .
+RUN CGO_ENABLED=0 go build -a -o hello-finch .
 
 FROM scratch
 COPY --from=builder /build/hello-finch /app/