Update README.md

README.md

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 Monitors status of Juniper BGP peers (IPv4 and IPv6)
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-## Insallation
+### Insallation
 
 In addition to this package you need to install the vendor independent plugin [BGP Peer](https://thl-cmk.hopto.org/gitlab/checkmk/vendor-independent/bgp_peer "BGP Peer") as well. 
 
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-## Check Info:
+### Check Info:
 
 * *service*: this check creates one service for each peer/address family/routing instance  (IPv4 and IPv6)
 * *state*: [see bgp_peer states](https://thl-cmk.hopto.org/gitlab/checkmk/vendor-independent/bgp_peer/-/blob/master/README.md "BGP peer readme.md")
@@ -31,8 +30,9 @@ In addition to this package you need to install the vendor independent plugin [B
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 #### Want to contribute?
 Nice ;-) Have a look at the [contribution guidelines](CONTRIBUTING.md "Contributing")
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-## Sample output
+### Sample output
 
 ![sample output](/doc/sample.png?raw=true "sample output")