install llvm@15

Change-Id: I79aa47c1cd155bc095ed69986e6a8281f5015c4e

Author: rdementi

.github/workflows/macos-scan-build.yml

@@ -32,16 +32,16 @@ jobs:
 
     - name: install brew
       run: |
-        brew install llvm
+        brew install llvm@15
 
     - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       with:
         submodules: recursive
     - name: cmake
       run: |
         rm -rf ${{ github.workspace }}/build
-        /usr/local/opt/llvm/bin/scan-build cmake -B ${{ github.workspace }}/build -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}
+        /usr/local/opt/llvm@15/bin/scan-build cmake -B ${{ github.workspace }}/build -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}
     - name: make
       run: |
         cd ${{ github.workspace }}/build
-        /usr/local/opt/llvm/bin/scan-build --exclude src/simdjson --status-bugs make -j
+        /usr/local/opt/llvm@15/bin/scan-build --exclude src/simdjson --status-bugs make -j