Update RulesMissingDocumentation.md to add missing documentation for CA1873, CA1874, CA1875, CA2023, and CA2026

Author: xtqqczze

src/Microsoft.CodeAnalysis.NetAnalyzers/src/RulesMissingDocumentation.md

@@ -2,3 +2,9 @@
 
 Rule ID | Missing Help Link | Title |
 --------|-------------------|-------|
+CA1873 | <https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1873> | Avoid potentially expensive logging |
+CA1874 | <https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1874> | Use 'Regex.IsMatch' |
+CA1875 | <https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1875> | Use 'Regex.Count' |
+CA1877 | <https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/cA1877> | Collapse consecutive Path.Combine or Path.Join operations |
+CA2023 | <https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2023> | Invalid braces in message template |
+CA2026 | <https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2026> | Prefer JsonElement.Parse over JsonDocument.Parse().RootElement |