Update documentation for MD044/proper-names to show how to handle differing capitalization (closes #1288).

doc-build/md044.md

@@ -13,6 +13,16 @@ enforce the proper capitalization, specify the desired letter case in the
 ]
 ```
 
+Sometimes a proper name is capitalized differently in certain contexts. In such
+cases, add both forms to the `names` array:
+
+```json
+[
+    "GitHub",
+    "github.com"
+]
+```
+
 Set the `code_blocks` parameter to `false` to disable this rule for code blocks
 and spans. Set the `html_elements` parameter to `false` to disable this rule
 for HTML elements and attributes (such as when using a proper name as part of

doc/Rules.md

@@ -1834,6 +1834,16 @@ enforce the proper capitalization, specify the desired letter case in the
 ]
 ```
 
+Sometimes a proper name is capitalized differently in certain contexts. In such
+cases, add both forms to the `names` array:
+
+```json
+[
+    "GitHub",
+    "github.com"
+]
+```
+
 Set the `code_blocks` parameter to `false` to disable this rule for code blocks
 and spans. Set the `html_elements` parameter to `false` to disable this rule
 for HTML elements and attributes (such as when using a proper name as part of

doc/md044.md

@@ -27,6 +27,16 @@ enforce the proper capitalization, specify the desired letter case in the
 ]
 ```
 
+Sometimes a proper name is capitalized differently in certain contexts. In such
+cases, add both forms to the `names` array:
+
+```json
+[
+    "GitHub",
+    "github.com"
+]
+```
+
 Set the `code_blocks` parameter to `false` to disable this rule for code blocks
 and spans. Set the `html_elements` parameter to `false` to disable this rule
 for HTML elements and attributes (such as when using a proper name as part of