community[patch]: fix import in language parser (#17538)

- **Description:** Resolving import error in language_parser.py during
"from langchain.langchain.text_splitter import Language - **Issue:** the
issue #17536
- **Dependencies:** NO
- **Twitter handle:** @iRakibHosen

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Co-authored-by: Bagatur <baskaryan@gmail.com>

libs/langchain/langchain/text_splitter.py

@@ -843,6 +843,9 @@ class Language(str, Enum):
     SOL = "sol"
     CSHARP = "csharp"
     COBOL = "cobol"
+    C = "c"
+    LUA = "lua"
+    PERL = "perl"
 
 
 class RecursiveCharacterTextSplitter(TextSplitter):