docs: fix missed MD051/link-fragments (#5147)

Author: petrasovaa

raster/r.cost/r.cost.md

@@ -10,7 +10,7 @@ lowest total cost of traversing the space between each cell and the
 user-specified points (diagonal costs are multiplied by a factor that
 depends on the dimensions of the cell) and 2) a second raster map layer
 showing the movement direction to the next cell on the path back to the
-start point (see [Movement Direction](#move)). This module uses the
+start point (see [Movement Direction](#movement-direction)). This module uses the
 current geographic region settings. The **output** map will be of the
 same data format as the **input** map, integer or floating point.
 
@@ -20,7 +20,7 @@ The **input** *name* is the name of a raster map whose category values
 represent the surface cost. The **output** *name* is the name of the
 resultant raster map of cumulative cost. The **outdir** *name* is the
 name of the resultant raster map of movement directions (see [Movement
-Direction](#move)).
+Direction](#movement-direction)).
 
 *r.cost* can be run with three different methods of identifying the
 starting point(s). One or more points (geographic coordinate pairs) can

raster/r.walk/r.walk.md

@@ -9,7 +9,7 @@ map layer whose cell values represent friction cost.
 (time) of moving between each cell and the user-specified starting
 points and 2) a second raster map showing the movement direction to the
 next cell on the path back to the start point (see [Movement
-Direction](#move)). It uses an input elevation raster map whose cell
+Direction](#movement-direction)). It uses an input elevation raster map whose cell
 category values represent elevation, combined with a second input raster
 map whose cell values represent friction costs.
 

vector/v.label/v.label.md

@@ -95,8 +95,8 @@ The text can be highlighted in another color so that it appears to be in
 two colors. The text is drawn first in this color at a wider line width,
 and then redrawn in the text color at the regular line width. No
 highlight color ("`none`") is used by default, if unspecified by the
-user. To specify use of no highlight color, specify "`none`". (See [TEXT
-COLOR](#textcolor) above for a list of permissible color names.)
+user. To specify use of no highlight color, specify "`none`". (See TEXT
+COLOR above for a list of permissible color names.)
 
 **HIGHLIGHT WIDTH**:  
 Specifies how far from the text lines (in units of pixels) the highlight
@@ -106,13 +106,13 @@ highlight color).
 **BACKGROUND COLOR**:  
 Text may be boxed in a solid color by specifying a background color.
 Specify "`none`" for no background. The default background color
-setting, if unspecified by the user, is *white*. (See [TEXT
-COLOR](#textcolor) above for a list of permissible color names.)
+setting, if unspecified by the user, is *white*. (See TEXT
+COLOR above for a list of permissible color names.)
 
 **BORDER COLOR**:  
 Select a color for the border around the background. Specify "`none`" to
 suppress the border. The default border color used, if unspecified, is
-*black*. (See [TEXT COLOR](#textcolor) above for a list of permissible
+*black*. (See TEXT COLOR above for a list of permissible
 color names.)
 
 **OPAQUE TO VECTORS**: