Update link for "Tiny Go: Small is Going Big"

Link to "Tiny Go: Small is Going Big" is wrong. Clicking it returns this:
```
403 ERROR
The request could not be satisfied.
Request blocked. We can't connect to the server for this app or website at this time. There might be too much traffic or a configuration error. Try again later, or contact the app or website owner.
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Generated by cloudfront (CloudFront)
Request ID: dAvMi1TGSq5NVhgdRsYOasdlKIOFmWJFhZvyQG7VO21HoG_DHf7dtA==
```

Author: andreagrandi

content/media/_index.md

@@ -9,7 +9,7 @@ Here are some of the videos, podcasts, and blog posts written about TinyGo.
 ### Podcasts/Videos
 
 **QCon 2020 London - "Tiny Go: Small is Going Big"** - *March 3, 2020*
-https://videoh.infoq.com/presentations/20-mar-tinygosmallisgoingbig.mp4
+https://www.infoq.com/presentations/tiny-go/
 
 **FOSDEM 2020 - "Lightning talk: LED cube using TinyGo"** (start at 51:00) - *February 2, 2020*
 https://video.fosdem.org/2020/UB2.252A/golightning.mp4