Remove Sustaining sponsors from sample metadata

Dockerfile

@@ -48,7 +48,7 @@ ENV DJANGO_DEBUG True
 ENV HEADER_ALERT="<p>You are invited to our upcoming event, St. Hat-trick's day!  Come with a team or join a new one on Saturday, March 16.  Be sure to RSVP on <a href='https://www.eventbrite.com/e/st-hack-tricks-day-tickets-54897293282'>Eventbrite</a>!</p>"
 
 # Sponsor information
-ENV SPONSORS_METADATA='[{"displayName":"Textio","url":"https://medium.com/democracylab-org/textio-engages-employees-to-accelerate-civic-innovation-5984609a95ce","thumbnailUrl":"https://d1agxr2dqkgkuy.cloudfront.net/img/textio_logo_315_trans.png","description":"Textio is the inventor of augmented writing. Textio transforms your rough ideas into powerful language by hitting Tab."},{"displayName":"HERE Technologies","url":"https://www.here.com/","thumbnailUrl":"https://d1agxr2dqkgkuy.cloudfront.net/img/here_technologies.png","description":"By building a digital representation of reality entirely built upon location data, we are radically transforming the way the world lives, moves and interacts"},{"displayName":"Amazon","url":"https://www.aboutamazon.com/our-communities/amazon-in-the-community","thumbnailUrl":"https://d1agxr2dqkgkuy.cloudfront.net/img/amazon_logo.png","description":"At Amazon, we focus on building long-term and innovative programs that will have a lasting, positive impact in communities around the world."}]'
+ENV SPONSORS_METADATA='[{"displayName":"Microsoft","url":"https://www.microsoft.com/en-us/","thumbnailUrl":"https://d1agxr2dqkgkuy.cloudfront.net/img/microsoft_300_transparent.png","description":"We’re on a mission to empower every person and every organization on the planet to achieve more.","category":"In-kind Support"},{"displayName":"Google","url":"https://www.google.com/nonprofits/","thumbnailUrl":"https://d1agxr2dqkgkuy.cloudfront.net/img/google_200_transparent.png", "category":"In-kind Support"},{"displayName":"Salesforce","url":"https://www.salesforce.org/power-of-us/","thumbnailUrl":"https://d1agxr2dqkgkuy.cloudfront.net/img/Salesforce_200_transparent.png","category":"In-kind Support"},{"displayName":"User Testing","url":"https://www.usertesting.com/about-us/usertesting-oneworld","thumbnailUrl":"https://d1agxr2dqkgkuy.cloudfront.net/img/User_Testing_200_transparent.png","category":"In-kind Support"},{"displayName":"Slack","url":"https://slack.com/","thumbnailUrl":"https://d1agxr2dqkgkuy.cloudfront.net/img/slack_200_transparent.png","category":"In-kind Support"}]'
 
 # Configure project description example link
 ENV PROJECT_DESCRIPTION_EXAMPLE_URL "https://www.democracylab.org/projects/1"