Update round_to_significant_digits

Author: gapple

content/components/sensor/_index.md

@@ -255,9 +255,9 @@ filters:
 
 {{< include "filter/round_to_multiple_of.md" >}}
 
-### `round_to_sigfig`
+### `round_to_significant_digits`
 
-{{< include "filter/round_to_sigfig.md" >}}
+{{< include "filter/round_to_significant_digits.md" >}}
 
 ### `skip_initial`
 

content/components/sensor/filter/round_to_sigfig.md renamed to content/components/sensor/filter/round_to_significant_digits.md

@@ -3,18 +3,18 @@ description: ""
 headless: true
 ---
 
-Rounds the value to the specified number of significant figures. Takes an integer greater than zero.
+Rounds the value to the specified number of significant digits. Takes an integer greater than zero.
 
 ```yaml
 - platform: ...
   filters:
-    - round_to_sigfig: 2
+    - round_to_significant_digits: 2
     # 3.14159 -> 3.1
     # 157079 -> 160000
 
 - platform: ...
   filters:
-    - round_to_sigfig: 4
+    - round_to_significant_digits: 4
     # 3.14159 -> 3.142
     # 157079 -> 157100
 ```