fix: make generate is failing because of old go version

[varkey98]

varkeychanjacob@Varkeychans-Laptop agent-config % make generate                          
buf generate
ROOT="/Users/varkeychanjacob/Projects/agent-config/proto" \
        OUT_DIR="/Users/varkeychanjacob/Projects/agent-config/gen/go" \
        OPT_MODULE="github.com/Traceableai/agent-config/gen/go" \
        ENV_PREFIX="TA_" \
        /Applications/Xcode.app/Contents/Developer/usr/bin/make -C ./tools/hypertrace/agent-config/tools/go-generator
Generating the loaders
Done.
Tidy generated modules.
go: finding module for package github.com/ghodss/yaml
go: finding module for package github.com/stretchr/testify/assert
go: finding module for package google.golang.org/protobuf/reflect/protoreflect
go: finding module for package google.golang.org/protobuf/types/known/wrapperspb
go: finding module for package google.golang.org/protobuf/encoding/protojson
go: finding module for package google.golang.org/protobuf/proto
go: finding module for package google.golang.org/protobuf/runtime/protoimpl
go: found github.com/ghodss/yaml in github.com/ghodss/yaml v1.0.0
go: found google.golang.org/protobuf/encoding/protojson in google.golang.org/protobuf v1.35.1
go: found google.golang.org/protobuf/proto in google.golang.org/protobuf v1.35.1
go: found google.golang.org/protobuf/reflect/protoreflect in google.golang.org/protobuf v1.35.1
go: found google.golang.org/protobuf/runtime/protoimpl in google.golang.org/protobuf v1.35.1
go: found google.golang.org/protobuf/types/known/wrapperspb in google.golang.org/protobuf v1.35.1
go: found github.com/stretchr/testify/assert in github.com/stretchr/testify v1.9.0
go: finding module for package gopkg.in/yaml.v2
go: found gopkg.in/yaml.v2 in gopkg.in/yaml.v2 v2.4.0
go: google.golang.org/protobuf@v1.35.1 requires go@1.21, but 1.19 is requested
make: *** [generate-proto] Error 1