Update four http version man page sections.
Closes #8254
Tags: Versions
Protocols: HTTP
Added: 7.9.1
-Mutexed: http1.1 http2
+Mutexed: http1.1 http2 http2-prior-knowledge http3
Help: Use HTTP 1.0
Category: http
Example: --http1.0 $URL
Tags: Versions
Protocols: HTTP
Added: 7.33.0
-Mutexed: http1.0 http2
+Mutexed: http1.0 http2 http2-prior-knowledge http3
Help: Use HTTP 1.1
Category: http
Example: --http1.1 $URL
-See-also: http1.1 http0.9
+See-also: http1.0 http0.9
---
Tells curl to use HTTP version 1.1.
Tags: Versions
Protocols: HTTP
Added: 7.49.0
-Mutexed: http1.1 http1.0 http2
+Mutexed: http1.1 http1.0 http2 http3
Requires: HTTP/2
Help: Use HTTP 2 without HTTP/1.1 Upgrade
Category: http
Tags: Versions
Protocols: HTTP
Added: 7.33.0
-Mutexed: http1.1 http1.0 http2-prior-knowledge
+Mutexed: http1.1 http1.0 http2-prior-knowledge http3
Requires: HTTP/2
See-also: no-alpn
Help: Use HTTP 2