fix: correct table format in AnalyzerReleases.Unshipped.md to resolve build warning

Author: NehanPathan

src/Lucene.Net.CodeAnalysis.Dev/AnalyzerReleases.Unshipped.md

@@ -1,10 +1,10 @@
 ### New Rules
 
- Rule ID       | Category | Severity | Notes
----------------|----------|----------|-----------------------------------------------------------------------------------------------------------------------------------------------------------
- LuceneDev1007 | Design   | Warning  | Generic Dictionary<TKey, TValue> indexer should not be used to retrieve values because it may throw KeyNotFoundException (value type value)
- LuceneDev1008 | Design   | Warning  | Generic Dictionary<TKey, TValue> indexer should not be used to retrieve values because it may throw KeyNotFoundException (reference type value)
- LuceneDev6000 | Usage    | Info     | IDictionary indexer may be used to retrieve values, but must be checked for null before using the value
- LuceneDev6001 | Usage    | Error    | String overloads of StartsWith/EndsWith/IndexOf/LastIndexOf must be called with StringComparison.Ordinal or StringComparison.OrdinalIgnoreCase
- LuceneDev6002 | Usage    | Warning  | Span overloads of StartsWith/EndsWith/IndexOf/LastIndexOf should not pass non-Ordinal StringComparison
- LuceneDev6003 | Usage    | Info     | Single-character string arguments should use the char overload of StartsWith/EndsWith/IndexOf/LastIndexOf instead of a string
+Rule ID       | Category | Severity | Notes
+--------------|----------|----------|-----------------------------------------------------------------------------------------------------------------------------------------------------------
+LuceneDev1007 | Design   | Warning  | Generic Dictionary<TKey, TValue> indexer should not be used to retrieve values because it may throw KeyNotFoundException (value type value)
+LuceneDev1008 | Design   | Warning  | Generic Dictionary<TKey, TValue> indexer should not be used to retrieve values because it may throw KeyNotFoundException (reference type value)
+LuceneDev6000 | Usage    | Info     | IDictionary indexer may be used to retrieve values, but must be checked for null before using the value
+LuceneDev6001 | Usage    | Error    | String overloads of StartsWith/EndsWith/IndexOf/LastIndexOf must be called with StringComparison.Ordinal or StringComparison.OrdinalIgnoreCase
+LuceneDev6002 | Usage    | Warning  | Span overloads of StartsWith/EndsWith/IndexOf/LastIndexOf should not pass non-Ordinal StringComparison
+LuceneDev6003 | Usage    | Info     | Single-character string arguments should use the char overload of StartsWith/EndsWith/IndexOf/LastIndexOf instead of a string