chore(deps): update module github.com/bufbuild/buf to v1.38.0 (#88)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Earthfile

@@ -29,7 +29,7 @@ golang-base:
     RUN go install github.com/vektra/mockery/v2@v2.42.0
 
     # install buf from source
-    RUN GO111MODULE=on GOBIN=/usr/local/bin go install github.com/bufbuild/buf/cmd/buf@v1.37.0
+    RUN GO111MODULE=on GOBIN=/usr/local/bin go install github.com/bufbuild/buf/cmd/buf@v1.38.0
 
     # install oapi to generate swagger
     RUN go install github.com/oapi-codegen/oapi-codegen/v2/cmd/oapi-codegen@latest