More typo fixes and compiler corrections

This is not going too smoothly :D I'm also being caught out by the fact
that my local machine has the latest compilers but the docker images are
a bit older so using their default versions often trips us up.

Author: php1ic

.circleci/config.yml

@@ -72,19 +72,19 @@ jobs:
     docker:
       - image: cimg/base:current 
     steps:
-      - run: sudo apt update && sudo apt install -y git cmake ninja-build clang llvm
+      - run: sudo apt update && sudo apt install -y git cmake ninja-build clang-15 llvm
       - full_checkout
-      - run: cmake -GNinja -H. -B../Debug-build -DINCH_UNIT_TESTS=ON -DCMAKE_CXX_COMPILER=/usr/bin/clang++ -DCMAKE_BUILD_TYPE=Debug
+      - run: cmake -GNinja -H. -B../Debug-build -DINCH_UNIT_TESTS=ON -DCMAKE_CXX_COMPILER=/usr/bin/clang++-15 -DCMAKE_BUILD_TYPE=Debug
       - build_and_test:
           dir: ../Debug-build
 
   build_clang_release:
     docker:
       - image: cimg/base:current
     steps:
-      - run: sudo apt update && sudo apt install -y git cmake ninja-build clang llvm
+      - run: sudo apt update && sudo apt install -y git cmake ninja-build clang-15 llvm
       - full_checkout
-      - run: cmake -GNinja -H. -B../Release-build -DINCH_UNIT_TESTS=ON -DCMAKE_CXX_COMPILER=/usr/bin/clang++ -DCMAKE_BUILD_TYPE=Release
+      - run: cmake -GNinja -H. -B../Release-build -DINCH_UNIT_TESTS=ON -DCMAKE_CXX_COMPILER=/usr/bin/clang++-15 -DCMAKE_BUILD_TYPE=Release
       - build_and_test:
           dir: ../Release-build
 

.github/workflows/cmake_build.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        compiler: [clang++, g++]
+        compiler: [clang++-15, g++]
         type: [Debug, Release]
 
     steps:
@@ -28,10 +28,10 @@ jobs:
           submodules: true
 
       - name: Install dependencies
-        run: sudo apt update && sudo apt install -y cmake ninja-build clang gcc g++ clang
+        run: sudo apt update && sudo apt install -y cmake ninja-build gcc g++ clang-15
 
       - name: Configure
-        run: cmake -GNinja -H. -B../Build -DINCH_UNITS_TEST=ON -DCMAKE_CXX_COMPILER=/usr/bin/${{ matrix.compiler }} -DCMAKE_BUILD_TYPE=${{ matrix.type }}
+        run: cmake -GNinja -H. -B../Build -DINCH_UNIT_TESTS=ON -DCMAKE_CXX_COMPILER=/usr/bin/${{ matrix.compiler }} -DCMAKE_BUILD_TYPE=${{ matrix.type }}
 
       - name: Build
         run: cmake --build ../Build