Updated README.md (#7631)

* Add more Projects using Material for Mkdocs to README.md

* Remove PySimpleGUI no longer open source

Author: jk4e

Diff for: README.md

@@ -265,6 +265,7 @@ For detailed installation instructions, configuration options, and a demo, visit
 [CloudFlare](https://cloudflare.github.io/itty-router-openapi/),
 [Datadog](https://datadoghq.dev/integrations-core/),
 [Google](https://google.github.io/accompanist/),
+[Harvard](https://informatics.fas.harvard.edu/),
 [Hewlett Packard](https://hewlettpackard.github.io/squest/),
 [HSBC](https://hsbc.github.io/pyratings/),
 [ING](https://ing-bank.github.io/baker/),
@@ -275,28 +276,34 @@ For detailed installation instructions, configuration options, and a demo, visit
 [Mozilla](https://mozillafoundation.github.io/engineering-handbook/),
 [Netflix](https://netflix.github.io/titus/),
 [Red Hat](https://ansible.readthedocs.io/projects/lint/),
+[Roboflow](https://inference.roboflow.com/),
 [Salesforce](https://policy-sentry.readthedocs.io/),
 [SIEMENS](https://opensource.siemens.com/),
 [Slack](https://slackhq.github.io/circuit/),
 [Square](https://square.github.io/okhttp/),
+[Uber](https://uber-go.github.io/fx/),
 [Zalando](https://opensource.zalando.com/skipper/)
 
 ### ... and successful Open Source projects
 
+[Amp](https://amp.rs/docs/),
 [Arduino](https://arduino.github.io/arduino-cli/),
 [Auto-GPT](https://docs.agpt.co/),
 [AutoKeras](https://autokeras.com/),
 [BFE](https://www.bfe-networks.net/),
 [CentOS](https://docs.infra.centos.org/),
 [Crystal](https://crystal-lang.org/reference/),
+[eBPF](https://ebpf-go.dev/),
 [Electron](https://www.electron.build/),
 [FastAPI](https://fastapi.tiangolo.com/),
 [Freqtrade](https://www.freqtrade.io/en/stable/),
 [GoReleaser](https://goreleaser.com/),
+[HedgeDoc](https://docs.hedgedoc.org/),
 [Hummingbot](https://hummingbot.org/),
 [Knative](https://knative.dev/docs/),
 [Kubernetes](https://kops.sigs.k8s.io/),
 [kSQL](https://docs.ksqldb.io/),
+[NetBox](https://netboxlabs.com/docs/netbox/en/stable/),
 [Nokogiri](https://nokogiri.org/),
 [OpenFaaS](https://docs.openfaas.com/),
 [Orchard Core](https://docs.orchardcore.net/en/latest/),
@@ -305,10 +312,12 @@ For detailed installation instructions, configuration options, and a demo, visit
 [Pydantic](https://pydantic-docs.helpmanual.io/),
 [PyPI](https://docs.pypi.org/),
 [Renovate](https://docs.renovatebot.com/),
+[RetroPie](https://retropie.org.uk/docs/),
 [Supervision](https://supervision.roboflow.com/latest/),
 [Traefik](https://docs.traefik.io/),
 [Trivy](https://aquasecurity.github.io/trivy/),
 [Typer](https://typer.tiangolo.com/),
+[tinygrad](https://docs.tinygrad.org/),
 [Ultralytics](https://docs.ultralytics.com/),
 [Vapor](https://docs.vapor.codes/),
 [WebKit](https://docs.webkit.org/),