Docs: Consistent capitalization of tealdeer

Capitalize at the start of a sentence, lowercase otherwise.

docs/src/config_style.md

@@ -28,13 +28,13 @@ Colors can be specified in one of three ways:
 
       foreground = "green"
 
-- 256 color ANSI code (*Tealdeer v1.5.0+*)
+- 256 color ANSI code (*tealdeer v1.5.0+*)
 
   Example:
 
       foreground = { ansi = 4 }
 
-- 24-bit RGB color (*Tealdeer v1.5.0+*)
+- 24-bit RGB color (*tealdeer v1.5.0+*)
 
   Example:
 

docs/src/config_updates.md

@@ -2,7 +2,7 @@
 
 ## Automatic updates
 
-tealdeer can refresh the cache automatically when it is outdated. This
+Tealdeer can refresh the cache automatically when it is outdated. This
 behavior can be configured in the `updates` section and is disabled by
 default.
 

docs/src/installing.md

@@ -1,6 +1,6 @@
 # Installing
 
-There are a few different ways to install Tealdeer:
+There are a few different ways to install tealdeer:
 
 - Through [package managers](#package-managers)
 - Through [static binaries](#static-binaries-linux)

docs/src/intro.md

@@ -6,7 +6,7 @@ and community-driven man pages.
 
 ![Screenshot](screenshot-default.png)
 
-This documentation shows how to install, use and configure Tealdeer.
+This documentation shows how to install, use and configure tealdeer.
 
 ## Links