maint(deps): bump github.com/sethvargo/go-envconfig from 0.9.0 to 1.0.0

Bumps [github.com/sethvargo/go-envconfig](https://github.com/sethvargo/go-envconfig) from 0.9.0 to 1.0.0.
- [Release notes](https://github.com/sethvargo/go-envconfig/releases)
- [Commits](sethvargo/go-envconfig@v0.9.0...v1.0.0)

---
updated-dependencies:
- dependency-name: github.com/sethvargo/go-envconfig
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -3,7 +3,7 @@ module github.com/honeycombio/otel-config-go
 go 1.20
 
 require (
-	github.com/sethvargo/go-envconfig v0.9.0
+	github.com/sethvargo/go-envconfig v1.0.0
 	github.com/stretchr/testify v1.8.4
 	go.opentelemetry.io/contrib/detectors/aws/lambda v0.46.1
 	go.opentelemetry.io/contrib/instrumentation/host v0.46.1

go.sum

@@ -32,8 +32,8 @@ github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c/go.mod h1:Om
 github.com/power-devops/perfstat v0.0.0-20221212215047-62379fc7944b h1:0LFwY6Q3gMACTjAbMZBjXAqTOzOwFaj2Ld6cjeQ7Rig=
 github.com/power-devops/perfstat v0.0.0-20221212215047-62379fc7944b/go.mod h1:OmDBASR4679mdNQnz2pUhc2G8CO2JrUAVFDRBDP/hJE=
 github.com/rogpeppe/go-internal v1.11.0 h1:cWPaGQEPrBb5/AsnsZesgZZ9yb1OQ+GOISoDNXVBh4M=
-github.com/sethvargo/go-envconfig v0.9.0 h1:Q6FQ6hVEeTECULvkJZakq3dZMeBQ3JUpcKMfPQbKMDE=
-github.com/sethvargo/go-envconfig v0.9.0/go.mod h1:Iz1Gy1Sf3T64TQlJSvee81qDhf7YIlt8GMUX6yyNFs0=
+github.com/sethvargo/go-envconfig v1.0.0 h1:1C66wzy4QrROf5ew4KdVw942CQDa55qmlYmw9FZxZdU=
+github.com/sethvargo/go-envconfig v1.0.0/go.mod h1:Lzc75ghUn5ucmcRGIdGQ33DKJrcjk4kihFYgSTBmjIc=
 github.com/shirou/gopsutil/v3 v3.23.10 h1:/N42opWlYzegYaVkWejXWJpbzKv2JDy3mrgGzKsh9hM=
 github.com/shirou/gopsutil/v3 v3.23.10/go.mod h1:JIE26kpucQi+innVlAUnIEOSBhBUkirr5b44yr55+WE=
 github.com/shoenig/go-m1cpu v0.1.6 h1:nxdKQNcEB6vzgA2E2bvzKIYRuNj7XNJ4S/aRSwKzFtM=