fix typo on nokia (#137)

Co-authored-by: Simone Bortolin <[email protected]>

Author: simonebortolin

_ont/ont-nokia-g-010g-p.md

@@ -48,7 +48,7 @@ To access a complete linux shell just type:
 
 To exit the shell and reach the parent menu type `exit` or `x`, in each menu the `help` command will show how to use the shell
 
-{% include_relative ont-nokia-userful-command.md %}
+{% include_relative ont-nokia-useful-command.md %}
 
 # Miscellaneous Links
 - [MIB file parser](https://github.com/nanomad/nokia-ont-mib-parser) for NOKIA's GPON ONTs (*helps you parsing the .mib file located in `/mnt/rwdir`*)

_ont/ont-nokia-g-010g-q.md

@@ -71,7 +71,7 @@ ONT>
 
 {% include_relative ont-nokia-use.md %}
 
-{% include_relative ont-nokia-userful-command.md %}
+{% include_relative ont-nokia-useful-command.md %}
 
 # Miscellaneous Links
 - [MIB file parser](https://github.com/nanomad/nokia-ont-mib-parser) for NOKIA's GPON ONTs (*helps you parsing the .mib file located in `/mnt/rwdir`*)

_ont/ont-nokia-g-010g-r.md

@@ -46,7 +46,7 @@ The ONT has a TTL 3.3v UART console (configured as 115200 8-N-1) that can be acc
 
 {% include_relative ont-nokia-use.md %}
 
-{% include_relative ont-nokia-userful-command.md %}
+{% include_relative ont-nokia-useful-command.md %}
 
 # Miscellaneous Links
 - [MIB file parser](https://github.com/nanomad/nokia-ont-mib-parser)  for NOKIA's GPON ONTs (*helps you parsing the .mib file located in `/mnt/rwdir`*)

_ont/ont-nokia-g-010g-t.md

@@ -57,7 +57,7 @@ The ONT has a TTL 3.3v UART console (configured as 115200 8-N-1) that can be acc
 
 {% include_relative ont-nokia-use.md %}
 
-{% include_relative ont-nokia-userful-command.md %}
+{% include_relative ont-nokia-useful-command.md %}
 
 # Miscellaneous Links
 - [MIB file parser](https://github.com/nanomad/nokia-ont-mib-parser) for NOKIA's GPON ONTs (*helps you parsing the .mib file located in `/mnt/rwdir`*)

_ont/ont-nokia-g-010s-q.md

@@ -31,7 +31,7 @@ alias: CIG G-97S
 {% include image.html file="g-010s-q-teardown-1.jpg" alt="Nokia G-010S-Q Teardown Up" caption="Nokia G-010S-Q Teardown Up" %}
 {% include image.html file="g-010s-q-teardown-2.jpg" alt="Nokia G-010S-Q Teardown Down" caption="Nokia G-010S-Q Teardown Down" %}
 
-{% include_relative ont-nokia-userful-command.md %}
+{% include_relative ont-nokia-useful-command.md %}
 
 # Miscellaneous Links