fix the fluent-bit regex detection pattern (#3817)

Signed-off-by: Yuntao Hu <victorhu493@gmail.com>

syft/pkg/cataloger/binary/classifier_cataloger_test.go

@@ -1243,6 +1243,17 @@ func Test_Cataloger_PositiveCases(t *testing.T) {
 				Metadata:  metadata("fluent-bit-binary"),
 			},
 		},
+		{
+			logicalFixture: "fluent-bit/1.3.10/linux-arm",
+			expected: pkg.Package{
+				Name:      "fluent-bit",
+				Version:   "1.3.10",
+				Type:      "binary",
+				PURL:      "pkg:github/fluent/fluent-bit@1.3.10",
+				Locations: locations("fluent-bit"),
+				Metadata:  metadata("fluent-bit-binary"),
+			},
+		},
 		{
 			logicalFixture: "wp/2.9.0/linux-amd64",
 			expected: pkg.Package{

syft/pkg/cataloger/binary/classifiers.go

@@ -573,7 +573,8 @@ func DefaultClassifiers() []Classifier {
 				// [NUL]2.2.3[NUL]Fluent Bit
 				// [NUL]2.2.1[NUL][NUL][NUL]Fluent Bit
 				// [NUL]1.7.0[NUL]\x1b[1m[NUL]%sFluent Bit (versions 1.7.0-dev-3 through 1.7.0-dev-9 and 1.7.0-rc4 through 1.7.0-rc8)
-				`\x00(?P<version>[0-9]+\.[0-9]+\.[0-9]+)\x00(\x1b\[1m\x00|\x00\x00)?(%s)?Fluent`,
+				// [NUL][NUL]1.3.10[NUL][NUL]Fluent Bit v%s
+				`\x00(\x00)?(?P<version>[0-9]+\.[0-9]+\.[0-9]+)\x00(\x1b\[1m\x00|\x00|\x00\x00)?(%s)?Fluent`,
 			),
 			Package: "fluent-bit",
 			PURL:    mustPURL("pkg:github/fluent/fluent-bit@version"),

syft/pkg/cataloger/binary/test-fixtures/config.yaml

@@ -701,6 +701,13 @@ from-images:
     paths:
       - /fluent-bit/bin/fluent-bit
 
+  - version: 1.3.10
+    images:
+      - ref: fluent/fluent-bit:1.3.10@sha256:98b32ef90c3ee3f6981b2cf31b70dc7d6104c9800b7287d4758318e0c19f96a9
+        platform: linux/arm
+    paths:
+      - /fluent-bit/bin/fluent-bit
+
   - name: openssl
     version: 1.1.1w
     images: