Update _index.md (#5142)

removed Armv7 and Armv6 from supported architecture. see slack thread for more details.

https://raintank-corp.slack.com/archives/C011RGTMUSY/p1680887617024879

Co-authored-by: Clayton Cornell <[email protected]>
(cherry picked from commit 5cb9e6b)

Author: 2 people

docs/sources/flow/setup/install/_index.md

@@ -16,7 +16,7 @@ You can install Grafana Agent in flow mode on Docker, Kubernetes, Linux, macOS,
 
 The following architectures are supported:
 
-- Linux: AMD64, ARM64, ARMv6, ARMv7
+- Linux: AMD64, ARM64
 - Windows: AMD64
 - macOS: AMD64 (Intel), ARM64 (Apple Silicon)
 - FreeBSD: AMD64