Fixed a drawing related bug in the worksheet generation (#1011)

* Fixed a drawing related bug in the worksheet generation

The drawing's id referenced in the worksheet did not match the one defined in the .rels file

* Adjusted one of the tests to reflect the corrected drawing id

Author: michelebastione

src/MiniExcel.OpenXml/Constants/WorksheetXml.cs

@@ -68,5 +68,5 @@ internal static string Cell(string cellReference, string? cellType, string style
     }
 
     internal static string Autofilter(string dimensionRef) => $"<x:autoFilter ref=\"{dimensionRef}\" />";
-    internal static string Drawing(int sheetIndex) => $"<x:drawing r:id=\"drawing{sheetIndex}\" />";
-}
+    internal static string Drawing(int sheetIndex) => $"<x:drawing r:id=\"rDrawing{sheetIndex}\" />";
+}

tests/MiniExcel.OpenXml.Tests/Issues/MiniExcelGiteeIssuesTests.cs

@@ -316,13 +316,13 @@ public void IssueI50VD5()
             Assert.Contains("/xl/media/", SheetHelper.GetZipFileContent(path, "xl/drawings/_rels/drawing1.xml.rels"));
             Assert.Contains("ext cx=\"609600\" cy=\"190500\"", SheetHelper.GetZipFileContent(path, "xl/drawings/drawing1.xml"));
             Assert.Contains("/xl/drawings/drawing1.xml", SheetHelper.GetZipFileContent(path, "[Content_Types].xml"));
-            Assert.Contains("drawing r:id=\"drawing1\"", SheetHelper.GetZipFileContent(path, "xl/worksheets/sheet1.xml"));
+            Assert.Contains("drawing r:id=\"rDrawing1\"", SheetHelper.GetZipFileContent(path, "xl/worksheets/sheet1.xml"));
             Assert.Contains("../drawings/drawing1.xml", SheetHelper.GetZipFileContent(path, "xl/worksheets/_rels/sheet1.xml.rels"));
 
             Assert.Contains("/xl/media/", SheetHelper.GetZipFileContent(path, "xl/drawings/_rels/drawing2.xml.rels"));
             Assert.Contains("ext cx=\"609600\" cy=\"190500\"", SheetHelper.GetZipFileContent(path, "xl/drawings/drawing2.xml"));
             Assert.Contains("/xl/drawings/drawing1.xml", SheetHelper.GetZipFileContent(path, "[Content_Types].xml"));
-            Assert.Contains("drawing r:id=\"drawing2\"", SheetHelper.GetZipFileContent(path, "xl/worksheets/sheet2.xml"));
+            Assert.Contains("drawing r:id=\"rDrawing2\"", SheetHelper.GetZipFileContent(path, "xl/worksheets/sheet2.xml"));
             Assert.Contains("../drawings/drawing2.xml", SheetHelper.GetZipFileContent(path, "xl/worksheets/_rels/sheet2.xml.rels"));
         }
     }