GHA CI: fix CodeQL configuration (#24551)

* Really limit CodeQL analysis to libtorrent 2.0 branch
  Previously some required quotation marks are missing.
* Revert `category` key
  There is no need to differentiate libtorrent in CodeQL config.

Fix up d3063c9.

Author: Chocobo1

.github/workflows/ci_ubuntu.yaml

@@ -115,7 +115,7 @@ jobs:
       # to avoid scanning 3rdparty codebases, initialize it just before building qbt
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v4
-        if: startsWith(matrix.libtorrent.version, 2.0) && (matrix.qbt_gui == 'GUI=ON')
+        if: startsWith(matrix.libtorrent.version, '2.0') && (matrix.qbt_gui == 'GUI=ON')
         with:
           config-file: ./.github/workflows/helper/codeql/cpp.yaml
           languages: cpp
@@ -147,16 +147,16 @@ jobs:
 
       - name: Run CodeQL analysis
         uses: github/codeql-action/analyze@v4
-        if: startsWith(matrix.libtorrent.version, 2.0) && (matrix.qbt_gui == 'GUI=ON')
+        if: startsWith(matrix.libtorrent.version, '2.0') && (matrix.qbt_gui == 'GUI=ON')
         with:
-          category: "${{ github.base_ref || github.ref_name }} lt ${{ matrix.libtorrent.version }}"
+          category: ${{ github.base_ref || github.ref_name }}
           output: sarif-results
           upload: failure-only
 
       # Filter out results from 3rdparty codebases
       - name: Filter CodeQL results
         uses: advanced-security/filter-sarif@2da736ff05ef065cb2894ac6892e47b5eac2c3c0 # v1.1
-        if: startsWith(matrix.libtorrent.version, 2.0) && (matrix.qbt_gui == 'GUI=ON')
+        if: startsWith(matrix.libtorrent.version, '2.0') && (matrix.qbt_gui == 'GUI=ON')
         with:
           patterns: |
             -src/base/3rdparty/**
@@ -165,7 +165,7 @@ jobs:
 
       - name: Upload CodeQL SARIF
         uses: github/codeql-action/upload-sarif@v4
-        if: startsWith(matrix.libtorrent.version, 2.0) && (matrix.qbt_gui == 'GUI=ON')
+        if: startsWith(matrix.libtorrent.version, '2.0') && (matrix.qbt_gui == 'GUI=ON')
         with:
           sarif_file: sarif-results/cpp.sarif