Fix a bunch of vale errors

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

packages/eslint-plugin/docs/rules/no-relative-monorepo-imports.md

@@ -10,7 +10,7 @@ Add the rules as follows, it has no options:
 "@backstage/no-relative-monorepo-imports": ["error"]
 ```
 
-The following patterns are considered files used during development, and only need dependencies to be declared in devDependencies:
+The following patterns are considered files used during development, and only need dependencies to be declared in `devDependencies`:
 
 ```python
 !src/**  # Any files outside of src are considered dev files

packages/eslint-plugin/docs/rules/no-undeclared-imports.md

@@ -10,7 +10,7 @@ Add the rules as follows, it has no options:
 "@backstage/no-undeclared-imports": ["error"]
 ```
 
-The following patterns are considered files used during development, and only need dependencies to be declared in devDependencies:
+The following patterns are considered files used during development, and only need dependencies to be declared in `devDependencies`:
 
 ```python
 !src/**  # Any files outside of src are considered dev files